57729561 has 16 divisors (see below), whose sum is σ = 79168320. Its totient is φ = 37402560.

The previous prime is 57729541. The next prime is 57729587. The reversal of 57729561 is 16592775.

It is not a de Polignac number, because 57729561 - 2¹⁰ = 57728537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57729541) 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, 15666 + ... + 18996.

It is an arithmetic number, because the mean of its divisors is an integer number (4948020).

Almost surely, 2^57729561 is an apocalyptic number.

It is an amenable number.

57729561 is a deficient number, since it is larger than the sum of its proper divisors (21438759).

57729561 is a wasteful number, since it uses less digits than its factorization.

57729561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3496.

The product of its digits is 132300, while the sum is 42.

The square root of 57729561 is about 7597.9971703074. The cubic root of 57729561 is about 386.4850966619.

The spelling of 57729561 in words is "fifty-seven million, seven hundred twenty-nine thousand, five hundred sixty-one".