72981608965 has 8 divisors (see below), whose sum is σ = 88686512640. Its totient is φ = 57646232592.

The previous prime is 72981608951. The next prime is 72981608971. The reversal of 72981608965 is 56980618927.

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 72981608965 - 2⁵ = 72981608933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92381389 + ... + 92382178.

It is an arithmetic number, because the mean of its divisors is an integer number (11085814080).

Almost surely, 2^72981608965 is an apocalyptic number.

It is an amenable number.

72981608965 is a deficient number, since it is larger than the sum of its proper divisors (15704903675).

72981608965 is a wasteful number, since it uses less digits than its factorization.

72981608965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184763651.

The product of its (nonzero) digits is 13063680, while the sum is 61.

The spelling of 72981608965 in words is "seventy-two billion, nine hundred eighty-one million, six hundred eight thousand, nine hundred sixty-five".