2156116356 has 81 divisors (see below), whose sum is σ = 5579208453. Its totient is φ = 702082080.

The previous prime is 2156116337. The next prime is 2156116367. The reversal of 2156116356 is 6536116512.

The square root of 2156116356 is 46434.

It is a perfect power (a square), and thus also a powerful number.

2156116356 is a `hidden beast` number, since 2 + 1 + 5 + 6 + 11 + 635 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1502802756 + 653313600 = 38766^2 + 25560^2 .

It is a super-2 number, since 2×2156116356² = 9297675481221437472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2156116356.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 19780830 + ... + 19780938.

Almost surely, 2^2156116356 is an apocalyptic number.

2156116356 is the 46434-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2156116356

2156116356 is an abundant number, since it is smaller than the sum of its proper divisors (3423092097).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2156116356 is a wasteful number, since it uses less digits than its factorization.

2156116356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370 (or 185 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The cubic root of 2156116356 is about 1291.8856217060.

Multiplying 2156116356 by its sum of digits (36), we get a square (77620188816 = 278604²).

2156116356 divided by its sum of digits (36) gives a square (59892121 = 7739²).

Multiplying 2156116356 by its product of digits (32400), we get a square (69858169934400 = 8358120²).

The spelling of 2156116356 in words is "two billion, one hundred fifty-six million, one hundred sixteen thousand, three hundred fifty-six".