57278801660 has 12 divisors (see below), whose sum is σ = 120285483528. Its totient is φ = 22911520656.

The previous prime is 57278801653. The next prime is 57278801669. The reversal of 57278801660 is 6610887275.

It is a super-2 number, since 2×57278801660² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 57278801599 and 57278801608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57278801669) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1431970022 + ... + 1431970061.

It is an arithmetic number, because the mean of its divisors is an integer number (10023790294).

Almost surely, 2^57278801660 is an apocalyptic number.

It is an amenable number.

57278801660 is an abundant number, since it is smaller than the sum of its proper divisors (63006681868).

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

57278801660 is a wasteful number, since it uses less digits than its factorization.

57278801660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2863940092 (or 2863940090 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 50.

The spelling of 57278801660 in words is "fifty-seven billion, two hundred seventy-eight million, eight hundred one thousand, six hundred sixty".