656989224861 has 8 divisors (see below), whose sum is σ = 914071965120. Its totient is φ = 418949650592.

The previous prime is 656989224839. The next prime is 656989224877. The reversal of 656989224861 is 168422989656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 656989224861 - 2⁶ = 656989224797 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 656989224792 and 656989224801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656989224761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4760791416 + ... + 4760791553.

It is an arithmetic number, because the mean of its divisors is an integer number (114258995640).

Almost surely, 2^656989224861 is an apocalyptic number.

It is an amenable number.

656989224861 is a deficient number, since it is larger than the sum of its proper divisors (257082740259).

656989224861 is a wasteful number, since it uses less digits than its factorization.

656989224861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9521582995.

The product of its digits is 89579520, while the sum is 66.

The spelling of 656989224861 in words is "six hundred fifty-six billion, nine hundred eighty-nine million, two hundred twenty-four thousand, eight hundred sixty-one".