72464313621 has 16 divisors (see below), whose sum is σ = 110575411200. Its totient is φ = 41350579248.

The previous prime is 72464313497. The next prime is 72464313641. The reversal of 72464313621 is 12631346427.

It is not a de Polignac number, because 72464313621 - 2⁹ = 72464313109 is a prime.

It is a super-2 number, since 2×72464313621² (a number of 23 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 72464313621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72464313641) 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, 2384541 + ... + 2414738.

It is an arithmetic number, because the mean of its divisors is an integer number (6910963200).

Almost surely, 2^72464313621 is an apocalyptic number.

It is an amenable number.

72464313621 is a deficient number, since it is larger than the sum of its proper divisors (38111097579).

72464313621 is a wasteful number, since it uses less digits than its factorization.

72464313621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4800008.

The product of its digits is 145152, while the sum is 39.

The spelling of 72464313621 in words is "seventy-two billion, four hundred sixty-four million, three hundred thirteen thousand, six hundred twenty-one".