656616741589 has 16 divisors (see below), whose sum is σ = 660761063424. Its totient is φ = 652487367600.

The previous prime is 656616741569. The next prime is 656616741601. The reversal of 656616741589 is 985147616656.

It is a cyclic number.

It is not a de Polignac number, because 656616741589 - 2⁷ = 656616741461 is a prime.

It is a super-2 number, since 2×656616741589² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 656616741589.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656616741509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235260784 + ... + 235263574.

It is an arithmetic number, because the mean of its divisors is an integer number (41297566464).

Almost surely, 2^656616741589 is an apocalyptic number.

It is an amenable number.

656616741589 is a deficient number, since it is larger than the sum of its proper divisors (4144321835).

656616741589 is a wasteful number, since it uses less digits than its factorization.

656616741589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4968.

The product of its digits is 65318400, while the sum is 64.

The spelling of 656616741589 in words is "six hundred fifty-six billion, six hundred sixteen million, seven hundred forty-one thousand, five hundred eighty-nine".