57777720057 has 24 divisors (see below), whose sum is σ = 83919638088. Its totient is φ = 38305267200.

The previous prime is 57777720053. The next prime is 57777720073. The reversal of 57777720057 is 75002777775.

It can be written as a sum of positive squares in 4 ways, for example, as 40518066681 + 17259653376 = 201291^2 + 131376^2 .

It is not a de Polignac number, because 57777720057 - 2² = 57777720053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 57777719985 and 57777720012.

It is not an unprimeable number, because it can be changed into a prime (57777720053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1571707 + ... + 1608047.

It is an arithmetic number, because the mean of its divisors is an integer number (3496651587).

Almost surely, 2^57777720057 is an apocalyptic number.

It is an amenable number.

57777720057 is a deficient number, since it is larger than the sum of its proper divisors (26141918031).

57777720057 is a wasteful number, since it uses less digits than its factorization.

57777720057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37321 (or 37318 counting only the distinct ones).

The product of its (nonzero) digits is 5882450, while the sum is 54.

The spelling of 57777720057 in words is "fifty-seven billion, seven hundred seventy-seven million, seven hundred twenty thousand, fifty-seven".