57640507 has 4 divisors (see below), whose sum is σ = 60146640. Its totient is φ = 55134376.

The previous prime is 57640493. The next prime is 57640519. The reversal of 57640507 is 70504675.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57640507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57640577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1253032 + ... + 1253077.

It is an arithmetic number, because the mean of its divisors is an integer number (15036660).

Almost surely, 2^57640507 is an apocalyptic number.

57640507 is a deficient number, since it is larger than the sum of its proper divisors (2506133).

57640507 is a wasteful number, since it uses less digits than its factorization.

57640507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506132.

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 57640507 is about 7592.1345483336. The cubic root of 57640507 is about 386.2862629031.

The spelling of 57640507 in words is "fifty-seven million, six hundred forty thousand, five hundred seven".