56685506421 has 16 divisors (see below), whose sum is σ = 77313579840. Its totient is φ = 36929568000.

The previous prime is 56685506411. The next prime is 56685506429. The reversal of 56685506421 is 12460558665.

It is not a de Polignac number, because 56685506421 - 2²¹ = 56683409269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56685506429) 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, 670276 + ... + 750093.

It is an arithmetic number, because the mean of its divisors is an integer number (4832098740).

Almost surely, 2^56685506421 is an apocalyptic number.

It is an amenable number.

56685506421 is a deficient number, since it is larger than the sum of its proper divisors (20628073419).

56685506421 is a wasteful number, since it uses less digits than its factorization.

56685506421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420676.

The product of its (nonzero) digits is 1728000, while the sum is 48.

The spelling of 56685506421 in words is "fifty-six billion, six hundred eighty-five million, five hundred six thousand, four hundred twenty-one".