57505221657604 has 144 divisors (see below), whose sum is σ = 120795547131840. Its totient is φ = 23872074589440.

The previous prime is 57505221657581. The next prime is 57505221657677. The reversal of 57505221657604 is 40675612250575.

It is a super-2 number, since 2×57505221657604² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3278697067 + ... + 3278714605.

Almost surely, 2^{57505221657604} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57505221657604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60397773565920).

57505221657604 is an abundant number, since it is smaller than the sum of its proper divisors (63290325474236).

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

57505221657604 is a wasteful number, since it uses less digits than its factorization.

57505221657604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21778 (or 21769 counting only the distinct ones).

The product of its (nonzero) digits is 17640000, while the sum is 55.

The spelling of 57505221657604 in words is "fifty-seven trillion, five hundred five billion, two hundred twenty-one million, six hundred fifty-seven thousand, six hundred four".