57640555 has 16 divisors (see below), whose sum is σ = 79176384. Its totient is φ = 39461760.

The previous prime is 57640543. The next prime is 57640559. The reversal of 57640555 is 55504675.

It is not a de Polignac number, because 57640555 - 2¹⁵ = 57607787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57640559) 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, 34929 + ... + 36541.

It is an arithmetic number, because the mean of its divisors is an integer number (4948524).

Almost surely, 2^57640555 is an apocalyptic number.

57640555 is a deficient number, since it is larger than the sum of its proper divisors (21535829).

57640555 is a wasteful number, since it uses less digits than its factorization.

57640555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2646.

The product of its (nonzero) digits is 105000, while the sum is 37.

The square root of 57640555 is about 7592.1377094992. The cubic root of 57640555 is about 386.2863701295.

The spelling of 57640555 in words is "fifty-seven million, six hundred forty thousand, five hundred fifty-five".