57016778220 has 36 divisors (see below), whose sum is σ = 172950894480. Its totient is φ = 15204474144.

The previous prime is 57016778219. The next prime is 57016778233. The reversal of 57016778220 is 2287761075.

57016778220 is a `hidden beast` number, since 570 + 1 + 6 + 7 + 78 + 2 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158379760 + ... + 158380119.

Almost surely, 2^57016778220 is an apocalyptic number.

It is an amenable number.

57016778220 is an abundant number, since it is smaller than the sum of its proper divisors (115934116260).

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

57016778220 is a wasteful number, since it uses less digits than its factorization.

57016778220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316759894 (or 316759889 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The spelling of 57016778220 in words is "fifty-seven billion, sixteen million, seven hundred seventy-eight thousand, two hundred twenty".