57781777080 has 64 divisors (see below), whose sum is σ = 174879401760. Its totient is φ = 15272112128.

The previous prime is 57781777069. The next prime is 57781777091. The reversal of 57781777080 is 8077718775.

It is an interprime number because it is at equal distance from previous prime (57781777069) and next prime (57781777091).

It is a self number, because there is not a number n which added to its sum of digits gives 57781777080.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2117037 + ... + 2144156.

Almost surely, 2^57781777080 is an apocalyptic number.

It is an amenable number.

57781777080 is an abundant number, since it is smaller than the sum of its proper divisors (117097624680).

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

57781777080 is a wasteful number, since it uses less digits than its factorization.

57781777080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4261320 (or 4261316 counting only the distinct ones).

The product of its (nonzero) digits is 5378240, while the sum is 57.

The spelling of 57781777080 in words is "fifty-seven billion, seven hundred eighty-one million, seven hundred seventy-seven thousand, eighty".