72636057 has 12 divisors (see below), whose sum is σ = 112989604. Its totient is φ = 44699040.

The previous prime is 72636049. The next prime is 72636059. The reversal of 72636057 is 75063627.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 45481536 + 27154521 = 6744^2 + 5211^2 .

It is not a de Polignac number, because 72636057 - 2³ = 72636049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72636059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 310294 + ... + 310527.

Almost surely, 2^72636057 is an apocalyptic number.

It is an amenable number.

72636057 is a deficient number, since it is larger than the sum of its proper divisors (40353547).

72636057 is a wasteful number, since it uses less digits than its factorization.

72636057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620840 (or 620837 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 36.

The square root of 72636057 is about 8522.6789802268. The cubic root of 72636057 is about 417.2382228358.

The spelling of 72636057 in words is "seventy-two million, six hundred thirty-six thousand, fifty-seven".