72557011 has 8 divisors (see below), whose sum is σ = 73573344. Its totient is φ = 71546880.

The previous prime is 72556987. The next prime is 72557041. The reversal of 72557011 is 11075527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72557011 - 2⁹ = 72556499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72557041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25101 + ... + 27841.

It is an arithmetic number, because the mean of its divisors is an integer number (9196668).

Almost surely, 2^72557011 is an apocalyptic number.

72557011 is a deficient number, since it is larger than the sum of its proper divisors (1016333).

72557011 is a wasteful number, since it uses less digits than its factorization.

72557011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3101.

The product of its (nonzero) digits is 2450, while the sum is 28.

The square root of 72557011 is about 8518.0403262722. The cubic root of 72557011 is about 417.0868150961.

The spelling of 72557011 in words is "seventy-two million, five hundred fifty-seven thousand, eleven".