156561873552 has 120 divisors (see below), whose sum is σ = 527104784960. Its totient is φ = 42377644800.

The previous prime is 156561873511. The next prime is 156561873553. The reversal of 156561873552 is 255378165651.

156561873552 is a `hidden beast` number, since 1 + 5 + 6 + 5 + 6 + 1 + 87 + 3 + 552 = 666.

It is a super-2 number, since 2×156561873552² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (156561873553) 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, 4068199 + ... + 4106502.

Almost surely, 2^156561873552 is an apocalyptic number.

156561873552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

156561873552 is an abundant number, since it is smaller than the sum of its proper divisors (370542911408).

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

156561873552 is a wasteful number, since it uses less digits than its factorization.

156561873552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8174741 (or 8174732 counting only the distinct ones).

The product of its digits is 7560000, while the sum is 54.

The spelling of 156561873552 in words is "one hundred fifty-six billion, five hundred sixty-one million, eight hundred seventy-three thousand, five hundred fifty-two".