656406233525 has 24 divisors (see below), whose sum is σ = 950013361920. Its totient is φ = 440530378560.

The previous prime is 656406233513. The next prime is 656406233537. The reversal of 656406233525 is 525332604656.

It is an interprime number because it is at equal distance from previous prime (656406233513) and next prime (656406233537).

It is not a de Polignac number, because 656406233525 - 2¹² = 656406229429 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a self number, because there is not a number n which added to its sum of digits gives 656406233525.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 39894890 + ... + 39911339.

It is an arithmetic number, because the mean of its divisors is an integer number (39583890080).

Almost surely, 2^656406233525 is an apocalyptic number.

It is an amenable number.

656406233525 is a deficient number, since it is larger than the sum of its proper divisors (293607128395).

656406233525 is a wasteful number, since it uses less digits than its factorization.

656406233525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79806293 (or 79806288 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 47.

The spelling of 656406233525 in words is "six hundred fifty-six billion, four hundred six million, two hundred thirty-three thousand, five hundred twenty-five".