656231313506 has 8 divisors (see below), whose sum is σ = 984512730960. Its totient is φ = 328060403188.

The previous prime is 656231313487. The next prime is 656231313509. The reversal of 656231313506 is 605313132656.

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

It is a super-3 number, since 3×656231313506³ (a number of 36 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (656231313509) 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, 27611936 + ... + 27635691.

It is an arithmetic number, because the mean of its divisors is an integer number (123064091370).

Almost surely, 2^656231313506 is an apocalyptic number.

656231313506 is a deficient number, since it is larger than the sum of its proper divisors (328281417454).

656231313506 is a wasteful number, since it uses less digits than its factorization.

656231313506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55253568.

The product of its (nonzero) digits is 291600, while the sum is 41.

The spelling of 656231313506 in words is "six hundred fifty-six billion, two hundred thirty-one million, three hundred thirteen thousand, five hundred six".