72155434515012 has 48 divisors (see below), whose sum is σ = 187491924271680. Its totient is φ = 23997518460864.

The previous prime is 72155434515001. The next prime is 72155434515041. The reversal of 72155434515012 is 21051543455127.

72155434515012 is a `hidden beast` number, since 7 + 2 + 1 + 5 + 543 + 4 + 51 + 50 + 1 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 754021993 + ... + 754117680.

It is an arithmetic number, because the mean of its divisors is an integer number (3906081755660).

Almost surely, 2^{72155434515012} is an apocalyptic number.

It is an amenable number.

72155434515012 is an abundant number, since it is smaller than the sum of its proper divisors (115336489756668).

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

72155434515012 is a wasteful number, since it uses less digits than its factorization.

72155434515012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508140129 (or 1508140121 counting only the distinct ones).

The product of its (nonzero) digits is 840000, while the sum is 45.

The spelling of 72155434515012 in words is "seventy-two trillion, one hundred fifty-five billion, four hundred thirty-four million, five hundred fifteen thousand, twelve".