72688275947521 has 16 divisors (see below), whose sum is σ = 78578953770240. Its totient is φ = 66840361859520.

The previous prime is 72688275947489. The next prime is 72688275947593. The reversal of 72688275947521 is 12574957288627.

It is a cyclic number.

It is not a de Polignac number, because 72688275947521 - 2⁵ = 72688275947489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72688275948521) 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, 188060500 + ... + 188446618.

It is an arithmetic number, because the mean of its divisors is an integer number (4911184610640).

Almost surely, 2^{72688275947521} is an apocalyptic number.

It is an amenable number.

72688275947521 is a deficient number, since it is larger than the sum of its proper divisors (5890677822719).

72688275947521 is a wasteful number, since it uses less digits than its factorization.

72688275947521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441456.

The product of its digits is 948326400, while the sum is 73.

The spelling of 72688275947521 in words is "seventy-two trillion, six hundred eighty-eight billion, two hundred seventy-five million, nine hundred forty-seven thousand, five hundred twenty-one".