656535455465 has 4 divisors (see below), whose sum is σ = 787842546564. Its totient is φ = 525228364368.

The previous prime is 656535455437. The next prime is 656535455489. The reversal of 656535455465 is 564554535656.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 158987207824 + 497548247641 = 398732^2 + 705371^2 .

It is a cyclic number.

It is not a de Polignac number, because 656535455465 - 2²⁰ = 656534406889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65653545542 + ... + 65653545551.

It is an arithmetic number, because the mean of its divisors is an integer number (196960636641).

Almost surely, 2^656535455465 is an apocalyptic number.

It is an amenable number.

656535455465 is a deficient number, since it is larger than the sum of its proper divisors (131307091099).

656535455465 is a wasteful number, since it uses less digits than its factorization.

656535455465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131307091098.

The product of its digits is 162000000, while the sum is 59.

The spelling of 656535455465 in words is "six hundred fifty-six billion, five hundred thirty-five million, four hundred fifty-five thousand, four hundred sixty-five".