656241430465 has 4 divisors (see below), whose sum is σ = 787489716564. Its totient is φ = 524993144368.

The previous prime is 656241430463. The next prime is 656241430487. The reversal of 656241430465 is 564034142656.

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 110003662224 + 546237768241 = 331668^2 + 739079^2 .

It is a cyclic number.

It is not a de Polignac number, because 656241430465 - 2¹ = 656241430463 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656241430463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65624143042 + ... + 65624143051.

It is an arithmetic number, because the mean of its divisors is an integer number (196872429141).

Almost surely, 2^656241430465 is an apocalyptic number.

It is an amenable number.

656241430465 is a deficient number, since it is larger than the sum of its proper divisors (131248286099).

656241430465 is a wasteful number, since it uses less digits than its factorization.

656241430465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131248286098.

The product of its (nonzero) digits is 2073600, while the sum is 46.

The spelling of 656241430465 in words is "six hundred fifty-six billion, two hundred forty-one million, four hundred thirty thousand, four hundred sixty-five".