72015821152956 has 36 divisors (see below), whose sum is σ = 182042918755152. Its totient is φ = 24004887819264.

The previous prime is 72015821152939. The next prime is 72015821152967. The reversal of 72015821152956 is 65925112851027.

It is a happy number.

72015821152956 is a `hidden beast` number, since 7 + 2 + 0 + 1 + 58 + 2 + 11 + 529 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13804165 + ... + 18291708.

Almost surely, 2^{72015821152956} is an apocalyptic number.

It is an amenable number.

72015821152956 is an abundant number, since it is smaller than the sum of its proper divisors (110027097602196).

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

72015821152956 is a wasteful number, since it uses less digits than its factorization.

72015821152956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32158210 (or 32158205 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 54.

It can be divided in two parts, 7201582 and 1152956, that added together give a palindrome (8354538).

The spelling of 72015821152956 in words is "seventy-two trillion, fifteen billion, eight hundred twenty-one million, one hundred fifty-two thousand, nine hundred fifty-six".