656811161673 has 8 divisors (see below), whose sum is σ = 890104743936. Its totient is φ = 430695843600.

The previous prime is 656811161659. The next prime is 656811161693. The reversal of 656811161673 is 376161118656.

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

It is not a de Polignac number, because 656811161673 - 2⁶ = 656811161609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (656811161653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1794565833 + ... + 1794566198.

It is an arithmetic number, because the mean of its divisors is an integer number (111263092992).

Almost surely, 2^656811161673 is an apocalyptic number.

It is an amenable number.

656811161673 is a deficient number, since it is larger than the sum of its proper divisors (233293582263).

656811161673 is a wasteful number, since it uses less digits than its factorization.

656811161673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3589132095.

The product of its digits is 1088640, while the sum is 51.

The spelling of 656811161673 in words is "six hundred fifty-six billion, eight hundred eleven million, one hundred sixty-one thousand, six hundred seventy-three".