72406621831038 has 16 divisors (see below), whose sum is σ = 157978083995136. Its totient is φ = 21941400554840.

The previous prime is 72406621831001. The next prime is 72406621831091. The reversal of 72406621831038 is 83013812660427.

It is a happy number.

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, 548535013806 + ... + 548535013937.

It is an arithmetic number, because the mean of its divisors is an integer number (9873630249696).

Almost surely, 2^{72406621831038} is an apocalyptic number.

72406621831038 is an abundant number, since it is smaller than the sum of its proper divisors (85571462164098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72406621831038 is a wasteful number, since it uses less digits than its factorization.

72406621831038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097070027759.

The product of its (nonzero) digits is 2322432, while the sum is 51.

The spelling of 72406621831038 in words is "seventy-two trillion, four hundred six billion, six hundred twenty-one million, eight hundred thirty-one thousand, thirty-eight".