72604728757881 has 6 divisors (see below), whose sum is σ = 104873497094730. Its totient is φ = 48403152505248.

The previous prime is 72604728757843. The next prime is 72604728757921. The reversal of 72604728757881 is 18875782740627.

72604728757881 is a `hidden beast` number, since 7 + 2 + 6 + 0 + 47 + 2 + 8 + 7 + 578 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 72201388179600 + 403340578281 = 8497140^2 + 635091^2 .

It is not a de Polignac number, because 72604728757881 - 2⁶ = 72604728757817 is a prime.

It is a super-2 number, since 2×72604728757881² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72604728757081) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4033596042096 + ... + 4033596042113.

It is an arithmetic number, because the mean of its divisors is an integer number (17478916182455).

Almost surely, 2^{72604728757881} is an apocalyptic number.

It is an amenable number.

72604728757881 is a deficient number, since it is larger than the sum of its proper divisors (32268768336849).

72604728757881 is a wasteful number, since it uses less digits than its factorization.

72604728757881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8067192084215 (or 8067192084212 counting only the distinct ones).

The product of its (nonzero) digits is 590069760, while the sum is 72.

The spelling of 72604728757881 in words is "seventy-two trillion, six hundred four billion, seven hundred twenty-eight million, seven hundred fifty-seven thousand, eight hundred eighty-one".