72438064016 has 20 divisors (see below), whose sum is σ = 140356527024. Its totient is φ = 36217024800.

The previous prime is 72438064003. The next prime is 72438064019. The reversal of 72438064016 is 61046083427.

It is a super-2 number, since 2×72438064016² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72438064019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197471 + ... + 428801.

Almost surely, 2^72438064016 is an apocalyptic number.

It is an amenable number.

72438064016 is a deficient number, since it is larger than the sum of its proper divisors (67918463008).

72438064016 is a wasteful number, since it uses less digits than its factorization.

72438064016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250910 (or 250904 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 41.

The spelling of 72438064016 in words is "seventy-two billion, four hundred thirty-eight million, sixty-four thousand, sixteen".