72561176000156 has 24 divisors (see below), whose sum is σ = 128878081441536. Its totient is φ = 35738873478000.

The previous prime is 72561176000141. The next prime is 72561176000189. The reversal of 72561176000156 is 65100067116527.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 72561176000156.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50198531 + ... + 51623781.

It is an arithmetic number, because the mean of its divisors is an integer number (5369920060064).

Almost surely, 2^{72561176000156} is an apocalyptic number.

It is an amenable number.

72561176000156 is a deficient number, since it is larger than the sum of its proper divisors (56316905441380).

72561176000156 is a wasteful number, since it uses less digits than its factorization.

72561176000156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615289 (or 1615287 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 47.

The spelling of 72561176000156 in words is "seventy-two trillion, five hundred sixty-one billion, one hundred seventy-six million, one hundred fifty-six", and thus it is an aban number.