72406703304631 has 16 divisors (see below), whose sum is σ = 74904070146048. Its totient is φ = 69919507778400.

The previous prime is 72406703304619. The next prime is 72406703304673. The reversal of 72406703304631 is 13640330760427.

It is a cyclic number.

It is not a de Polignac number, because 72406703304631 - 2⁷ = 72406703304503 is a prime.

It is a super-2 number, since 2×72406703304631² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72406703304731) 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, 64408221 + ... + 65522761.

It is an arithmetic number, because the mean of its divisors is an integer number (4681504384128).

Almost surely, 2^{72406703304631} is an apocalyptic number.

72406703304631 is a deficient number, since it is larger than the sum of its proper divisors (2497366841417).

72406703304631 is a wasteful number, since it uses less digits than its factorization.

72406703304631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119102.

The product of its (nonzero) digits is 1524096, while the sum is 46.

The spelling of 72406703304631 in words is "seventy-two trillion, four hundred six billion, seven hundred three million, three hundred four thousand, six hundred thirty-one".