72451795731 has 16 divisors (see below), whose sum is σ = 113964115968. Its totient is φ = 40065508800.

The previous prime is 72451795723. The next prime is 72451795739. The reversal of 72451795731 is 13759715427.

It is an interprime number because it is at equal distance from previous prime (72451795723) and next prime (72451795739).

It is not a de Polignac number, because 72451795731 - 2³ = 72451795723 is a prime.

It is a super-2 number, since 2×72451795731² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72451795739) 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, 55645890 + ... + 55647191.

It is an arithmetic number, because the mean of its divisors is an integer number (7122757248).

Almost surely, 2^72451795731 is an apocalyptic number.

72451795731 is a deficient number, since it is larger than the sum of its proper divisors (41512320237).

72451795731 is a wasteful number, since it uses less digits than its factorization.

72451795731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111293122.

The product of its digits is 1852200, while the sum is 51.

The spelling of 72451795731 in words is "seventy-two billion, four hundred fifty-one million, seven hundred ninety-five thousand, seven hundred thirty-one".