72645561527313 has 32 divisors (see below), whose sum is σ = 97507175141376. Its totient is φ = 48107568773888.

The previous prime is 72645561527309. The next prime is 72645561527387. The reversal of 72645561527313 is 31372516554627.

It is a cyclic number.

It is not a de Polignac number, because 72645561527313 - 2² = 72645561527309 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72645561527113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7148037970 + ... + 7148048132.

It is an arithmetic number, because the mean of its divisors is an integer number (3047099223168).

Almost surely, 2^{72645561527313} is an apocalyptic number.

It is an amenable number.

72645561527313 is a deficient number, since it is larger than the sum of its proper divisors (24861613614063).

72645561527313 is a wasteful number, since it uses less digits than its factorization.

72645561527313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18653.

The product of its digits is 31752000, while the sum is 57.

The spelling of 72645561527313 in words is "seventy-two trillion, six hundred forty-five billion, five hundred sixty-one million, five hundred twenty-seven thousand, three hundred thirteen".