72546881 has 6 divisors (see below), whose sum is σ = 79741746. Its totient is φ = 65951600.

The previous prime is 72546869. The next prime is 72546907. The reversal of 72546881 is 18864527.

It can be written as a sum of positive squares in only one way, i.e., 59290000 + 13256881 = 7700^2 + 3641^2 .

It is a de Polignac number, because none of the positive numbers 2^k-72546881 is a prime.

It is a super-2 number, since 2×72546881² = 10526099885656322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72546811) 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, 299660 + ... + 299901.

It is an arithmetic number, because the mean of its divisors is an integer number (13290291).

Almost surely, 2^72546881 is an apocalyptic number.

It is an amenable number.

72546881 is a deficient number, since it is larger than the sum of its proper divisors (7194865).

72546881 is a wasteful number, since it uses less digits than its factorization.

72546881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599583 (or 599572 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 72546881 is about 8517.4456851805. The cubic root of 72546881 is about 417.0674037577.

The spelling of 72546881 in words is "seventy-two million, five hundred forty-six thousand, eight hundred eighty-one".