1616856156 has 72 divisors (see below), whose sum is σ = 4195913904. Its totient is φ = 524655360.

The previous prime is 1616856151. The next prime is 1616856161. The reversal of 1616856156 is 6516586161.

1616856156 is a `hidden beast` number, since 16 + 16 + 8 + 5 + 615 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (1616856151) and next prime (1616856161).

It is a super-2 number, since 2×1616856156² = 5228447658390192672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616856151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 903895 + ... + 905681.

It is an arithmetic number, because the mean of its divisors is an integer number (58276582).

Almost surely, 2^1616856156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1616856156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2097956952).

1616856156 is an abundant number, since it is smaller than the sum of its proper divisors (2579057748).

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

1616856156 is a wasteful number, since it uses less digits than its factorization.

1616856156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2451 (or 2446 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 1616856156 is about 40210.1499126775. The cubic root of 1616856156 is about 1173.7000637467.

The spelling of 1616856156 in words is "one billion, six hundred sixteen million, eight hundred fifty-six thousand, one hundred fifty-six".