57520806858 has 160 divisors (see below), whose sum is σ = 142869412224. Its totient is φ = 17204825088.

The previous prime is 57520806851. The next prime is 57520806859. The reversal of 57520806858 is 85860802575.

It is a happy number.

57520806858 is a `hidden beast` number, since 5 + 7 + 520 + 8 + 0 + 68 + 58 = 666.

57520806858 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (57520806851) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 21978366 + ... + 21980982.

Almost surely, 2^57520806858 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57520806858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71434706112).

57520806858 is an abundant number, since it is smaller than the sum of its proper divisors (85348605366).

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

57520806858 is a wasteful number, since it uses less digits than its factorization.

57520806858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3018 (or 3009 counting only the distinct ones).

The product of its (nonzero) digits is 5376000, while the sum is 54.

The spelling of 57520806858 in words is "fifty-seven billion, five hundred twenty million, eight hundred six thousand, eight hundred fifty-eight".