72557078452 has 24 divisors (see below), whose sum is σ = 127401019200. Its totient is φ = 36156993600.

The previous prime is 72557078443. The next prime is 72557078479. The reversal of 72557078452 is 25487075527.

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 72557078452.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1414803 + ... + 1465189.

It is an arithmetic number, because the mean of its divisors is an integer number (5308375800).

Almost surely, 2^72557078452 is an apocalyptic number.

It is an amenable number.

72557078452 is a deficient number, since it is larger than the sum of its proper divisors (54843940748).

72557078452 is a wasteful number, since it uses less digits than its factorization.

72557078452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51591 (or 51589 counting only the distinct ones).

The product of its (nonzero) digits is 5488000, while the sum is 52.

The spelling of 72557078452 in words is "seventy-two billion, five hundred fifty-seven million, seventy-eight thousand, four hundred fifty-two".