72457757764731 has 16 divisors (see below), whose sum is σ = 107683453543200. Its totient is φ = 48152789591904.

The previous prime is 72457757764703. The next prime is 72457757764849. The reversal of 72457757764731 is 13746775775427.

72457757764731 is a `hidden beast` number, since 7 + 2 + 4 + 5 + 7 + 7 + 577 + 6 + 47 + 3 + 1 = 666.

It is not a de Polignac number, because 72457757764731 - 2¹⁷ = 72457757633659 is a prime.

It is a super-2 number, since 2×72457757764731² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72457757764731.

It is not an unprimeable number, because it can be changed into a prime (72457757364731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4232831596 + ... + 4232848713.

It is an arithmetic number, because the mean of its divisors is an integer number (6730215846450).

Almost surely, 2^{72457757764731} is an apocalyptic number.

72457757764731 is a deficient number, since it is larger than the sum of its proper divisors (35225695778469).

72457757764731 is a wasteful number, since it uses less digits than its factorization.

72457757764731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8465680635 (or 8465680629 counting only the distinct ones).

The product of its digits is 1694145600, while the sum is 72.

The spelling of 72457757764731 in words is "seventy-two trillion, four hundred fifty-seven billion, seven hundred fifty-seven million, seven hundred sixty-four thousand, seven hundred thirty-one".