72525319321 has 16 divisors (see below), whose sum is σ = 90725248768. Its totient is φ = 56441966400.

The previous prime is 72525319309. The next prime is 72525319337. The reversal of 72525319321 is 12391352527.

It is a cyclic number.

It is not a de Polignac number, because 72525319321 - 2⁷ = 72525319193 is a prime.

It is a super-2 number, since 2×72525319321² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72525319021) 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, 6527085 + ... + 6538186.

It is an arithmetic number, because the mean of its divisors is an integer number (5670328048).

Almost surely, 2^72525319321 is an apocalyptic number.

It is an amenable number.

72525319321 is a deficient number, since it is larger than the sum of its proper divisors (18199929447).

72525319321 is a wasteful number, since it uses less digits than its factorization.

72525319321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13065352.

The product of its digits is 113400, while the sum is 40.

The spelling of 72525319321 in words is "seventy-two billion, five hundred twenty-five million, three hundred nineteen thousand, three hundred twenty-one".