656982678485 has 16 divisors (see below), whose sum is σ = 919392672000. Its totient is φ = 450502406928.

The previous prime is 656982678479. The next prime is 656982678551. The reversal of 656982678485 is 584876289656.

It is not a de Polignac number, because 656982678485 - 2⁶ = 656982678421 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191538425 + ... + 191541854.

It is an arithmetic number, because the mean of its divisors is an integer number (57462042000).

Almost surely, 2^656982678485 is an apocalyptic number.

It is an amenable number.

656982678485 is a deficient number, since it is larger than the sum of its proper divisors (262409993515).

656982678485 is an equidigital number, since it uses as much as digits as its factorization.

656982678485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383080305 (or 383080291 counting only the distinct ones).

The product of its digits is 1393459200, while the sum is 74.

The spelling of 656982678485 in words is "six hundred fifty-six billion, nine hundred eighty-two million, six hundred seventy-eight thousand, four hundred eighty-five".