156055720172 has 12 divisors (see below), whose sum is σ = 297924556776. Its totient is φ = 70934418240.

The previous prime is 156055720169. The next prime is 156055720181. The reversal of 156055720172 is 271027550651.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1773360413 + ... + 1773360500.

It is an arithmetic number, because the mean of its divisors is an integer number (24827046398).

Almost surely, 2^156055720172 is an apocalyptic number.

It is an amenable number.

156055720172 is a deficient number, since it is larger than the sum of its proper divisors (141868836604).

156055720172 is a wasteful number, since it uses less digits than its factorization.

156055720172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3546720928 (or 3546720926 counting only the distinct ones).

The product of its (nonzero) digits is 147000, while the sum is 41.

The spelling of 156055720172 in words is "one hundred fifty-six billion, fifty-five million, seven hundred twenty thousand, one hundred seventy-two".