156644672256 has 144 divisors (see below), whose sum is σ = 463688104320. Its totient is φ = 52162790400.

The previous prime is 156644672237. The next prime is 156644672263. The reversal of 156644672256 is 652276446651.

156644672256 is a `hidden beast` number, since 1 + 56 + 64 + 467 + 22 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×156644672256² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 7253731 + ... + 7275293.

It is an arithmetic number, because the mean of its divisors is an integer number (3220056280).

Almost surely, 2^156644672256 is an apocalyptic number.

156644672256 is a gapful number since it is divisible by the number (16) 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 156644672256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231844052160).

156644672256 is an abundant number, since it is smaller than the sum of its proper divisors (307043432064).

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

156644672256 is a wasteful number, since it uses less digits than its factorization.

156644672256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22639 (or 22619 counting only the distinct ones).

The product of its digits is 14515200, while the sum is 54.

The spelling of 156644672256 in words is "one hundred fifty-six billion, six hundred forty-four million, six hundred seventy-two thousand, two hundred fifty-six".