656256004 has 12 divisors (see below), whose sum is σ = 1176459228. Its totient is φ = 320124800.

The previous prime is 656256001. The next prime is 656256061. The reversal of 656256004 is 400652656.

It can be written as a sum of positive squares in 2 ways, for example, as 221950404 + 434305600 = 14898^2 + 20840^2 .

It is not an unprimeable number, because it can be changed into a prime (656256001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2000617 + ... + 2000944.

It is an arithmetic number, because the mean of its divisors is an integer number (98038269).

Almost surely, 2^656256004 is an apocalyptic number.

It is an amenable number.

656256004 is a deficient number, since it is larger than the sum of its proper divisors (520203224).

656256004 is a wasteful number, since it uses less digits than its factorization.

656256004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4001606 (or 4001604 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 656256004 is about 25617.4941007117. The cubic root of 656256004 is about 869.0093113804.

The spelling of 656256004 in words is "six hundred fifty-six million, two hundred fifty-six thousand, four".