656561613162226 has 8 divisors (see below), whose sum is σ = 984843925474860. Its totient is φ = 328280304670608.

The previous prime is 656561613162199. The next prime is 656561613162251. The reversal of 656561613162226 is 622261316165656.

It can be written as a sum of positive squares in 2 ways, for example, as 643231804860225 + 13329808302001 = 25362015^2 + 3651001^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249317961 + ... + 251937628.

Almost surely, 2^{656561613162226} is an apocalyptic number.

656561613162226 is a deficient number, since it is larger than the sum of its proper divisors (328282312312634).

656561613162226 is a wasteful number, since it uses less digits than its factorization.

656561613162226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501910508.

The product of its digits is 27993600, while the sum is 58.

The spelling of 656561613162226 in words is "six hundred fifty-six trillion, five hundred sixty-one billion, six hundred thirteen million, one hundred sixty-two thousand, two hundred twenty-six".