156644974656 has 315 divisors, whose sum is σ = 487450967311. Its totient is φ = 49735800576.

The previous prime is 156644974639. The next prime is 156644974693. The reversal of 156644974656 is 656479446651.

The square root of 156644974656 is 395784.

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

156644974656 is a `hidden beast` number, since 1 + 5 + 66 + 449 + 74 + 65 + 6 = 666.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 156644974593 and 156644974602.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 655418185 + ... + 655418423.

Almost surely, 2^156644974656 is an apocalyptic number.

156644974656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

156644974656 is the 395784-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156644974656

156644974656 is an abundant number, since it is smaller than the sum of its proper divisors (330805992655).

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

156644974656 is an frugal number, since it uses more digits than its factorization.

156644974656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548 (or 267 counting only the distinct ones).

The product of its digits is 130636800, while the sum is 63.

The spelling of 156644974656 in words is "one hundred fifty-six billion, six hundred forty-four million, nine hundred seventy-four thousand, six hundred fifty-six".