57215015242566 has 128 divisors (see below), whose sum is σ = 125021831823360. Its totient is φ = 17388981244800.

The previous prime is 57215015242549. The next prime is 57215015242577. The reversal of 57215015242566 is 66524251051275.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3329736811 + ... + 3329753993.

It is an arithmetic number, because the mean of its divisors is an integer number (976733061120).

Almost surely, 2^{57215015242566} is an apocalyptic number.

57215015242566 is an abundant number, since it is smaller than the sum of its proper divisors (67806816580794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57215015242566 is a wasteful number, since it uses less digits than its factorization.

57215015242566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22362.

The product of its (nonzero) digits is 5040000, while the sum is 51.

The spelling of 57215015242566 in words is "fifty-seven trillion, two hundred fifteen billion, fifteen million, two hundred forty-two thousand, five hundred sixty-six".