72868903531 has 8 divisors (see below), whose sum is σ = 80039070720. Its totient is φ = 66032232552.

The previous prime is 72868903517. The next prime is 72868903561. The reversal of 72868903531 is 13530986827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72868903531 - 2²⁵ = 72835349099 is a prime.

It is a super-2 number, since 2×72868903531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72868903511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83373595 + ... + 83374468.

It is an arithmetic number, because the mean of its divisors is an integer number (10004883840).

Almost surely, 2^72868903531 is an apocalyptic number.

72868903531 is a deficient number, since it is larger than the sum of its proper divisors (7170167189).

72868903531 is a wasteful number, since it uses less digits than its factorization.

72868903531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166748105.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 72868903531 in words is "seventy-two billion, eight hundred sixty-eight million, nine hundred three thousand, five hundred thirty-one".