2156886512 has 80 divisors (see below), whose sum is σ = 4675307904. Its totient is φ = 955680000.

The previous prime is 2156886503. The next prime is 2156886553.

2156886512 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×2156886512² = 9304318851295052288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1190087 + ... + 1191897.

Almost surely, 2^2156886512 is an apocalyptic number.

2156886512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2156886512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2337653952).

2156886512 is an abundant number, since it is smaller than the sum of its proper divisors (2518421392).

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

2156886512 is a wasteful number, since it uses less digits than its factorization.

2156886512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998 (or 1992 counting only the distinct ones).

The product of its digits is 230400, while the sum is 44.

The square root of 2156886512 is about 46442.2922776213. The cubic root of 2156886512 is about 1292.0394221598.

The spelling of 2156886512 in words is "two billion, one hundred fifty-six million, eight hundred eighty-six thousand, five hundred twelve".