57684662778 has 16 divisors (see below), whose sum is σ = 115459262496. Its totient is φ = 19213231440.

The previous prime is 57684662689. The next prime is 57684662801. The reversal of 57684662778 is 87726648675.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3739033 + ... + 3754428.

It is an arithmetic number, because the mean of its divisors is an integer number (7216203906).

Almost surely, 2^57684662778 is an apocalyptic number.

57684662778 is an abundant number, since it is smaller than the sum of its proper divisors (57774599718).

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

57684662778 is a wasteful number, since it uses less digits than its factorization.

57684662778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7494749.

The product of its digits is 189665280, while the sum is 66.

The spelling of 57684662778 in words is "fifty-seven billion, six hundred eighty-four million, six hundred sixty-two thousand, seven hundred seventy-eight".