656398175028 has 12 divisors (see below), whose sum is σ = 1531595741760. Its totient is φ = 218799391672.

The previous prime is 656398175003. The next prime is 656398175033. The reversal of 656398175028 is 820571893656.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent 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, 27349923948 + ... + 27349923971.

It is an arithmetic number, because the mean of its divisors is an integer number (127632978480).

Almost surely, 2^656398175028 is an apocalyptic number.

It is an amenable number.

656398175028 is an abundant number, since it is smaller than the sum of its proper divisors (875197566732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

656398175028 is a wasteful number, since it uses less digits than its factorization.

656398175028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54699847926 (or 54699847924 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 60.

The spelling of 656398175028 in words is "six hundred fifty-six billion, three hundred ninety-eight million, one hundred seventy-five thousand, twenty-eight".