57061647 has 12 divisors (see below), whose sum is σ = 85264920. Its totient is φ = 36729168.

The previous prime is 57061637. The next prime is 57061649. The reversal of 57061647 is 74616075.

57061647 is a `hidden beast` number, since 5 + 7 + 0 + 6 + 1 + 647 = 666.

It is not a de Polignac number, because 57061647 - 2⁷ = 57061519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57061649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109053 + ... + 109574.

It is an arithmetic number, because the mean of its divisors is an integer number (7105410).

Almost surely, 2^57061647 is an apocalyptic number.

57061647 is a deficient number, since it is larger than the sum of its proper divisors (28203273).

57061647 is a wasteful number, since it uses less digits than its factorization.

57061647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218662 (or 218659 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 57061647 is about 7553.9160042987. The cubic root of 57061647 is about 384.9888049817.

The spelling of 57061647 in words is "fifty-seven million, sixty-one thousand, six hundred forty-seven".