57477681 has 20 divisors (see below), whose sum is σ = 88826100. Its totient is φ = 36995616.

The previous prime is 57477671. The next prime is 57477683. The reversal of 57477681 is 18677475.

57477681 is a `hidden beast` number, since 574 + 7 + 76 + 8 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18352656 + 39125025 = 4284^2 + 6255^2 .

It is not a de Polignac number, because 57477681 - 2¹⁴ = 57461297 is a prime.

It is a super-2 number, since 2×57477681² = 6607367626275522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (57477683) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9886 + ... + 14583.

It is an arithmetic number, because the mean of its divisors is an integer number (4441305).

Almost surely, 2^57477681 is an apocalyptic number.

It is an amenable number.

57477681 is a deficient number, since it is larger than the sum of its proper divisors (31348419).

57477681 is a wasteful number, since it uses less digits than its factorization.

57477681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24510 (or 24501 counting only the distinct ones).

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

The square root of 57477681 is about 7581.4036299356. The cubic root of 57477681 is about 385.9221858053.

The spelling of 57477681 in words is "fifty-seven million, four hundred seventy-seven thousand, six hundred eighty-one".