156161800800 has 144 divisors (see below), whose sum is σ = 564785257680. Its totient is φ = 41643141120.

The previous prime is 156161800787. The next prime is 156161800813. The reversal of 156161800800 is 8008161651.

156161800800 is a `hidden beast` number, since 1 + 561 + 6 + 18 + 0 + 0 + 80 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (156161800787) and next prime (156161800813).

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3593257 + ... + 3636456.

It is an arithmetic number, because the mean of its divisors is an integer number (3922119845).

Almost surely, 2^156161800800 is an apocalyptic number.

156161800800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156161800800 is an abundant number, since it is smaller than the sum of its proper divisors (408623456880).

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

156161800800 is a wasteful number, since it uses less digits than its factorization.

156161800800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7229742 (or 7229723 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The spelling of 156161800800 in words is "one hundred fifty-six billion, one hundred sixty-one million, eight hundred thousand, eight hundred".