56540208657 has 16 divisors (see below), whose sum is σ = 76844896128. Its totient is φ = 36969999360.

The previous prime is 56540208631. The next prime is 56540208719. The reversal of 56540208657 is 75680204565.

It is a happy number.

It is not a de Polignac number, because 56540208657 - 2¹² = 56540204561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56540200657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 646578 + ... + 728795.

It is an arithmetic number, because the mean of its divisors is an integer number (4802806008).

Almost surely, 2^56540208657 is an apocalyptic number.

It is an amenable number.

56540208657 is a deficient number, since it is larger than the sum of its proper divisors (20304687471).

56540208657 is a wasteful number, since it uses less digits than its factorization.

56540208657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375640.

The product of its (nonzero) digits is 2016000, while the sum is 48.

The spelling of 56540208657 in words is "fifty-six billion, five hundred forty million, two hundred eight thousand, six hundred fifty-seven".