656634955848 has 64 divisors (see below), whose sum is σ = 1682327949120. Its totient is φ = 213450700800.

The previous prime is 656634955799. The next prime is 656634955859. The reversal of 656634955848 is 848559436656.

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 15 ways as a sum of consecutive naturals, for example, 2240283 + ... + 2516373.

It is an arithmetic number, because the mean of its divisors is an integer number (26286374205).

Almost surely, 2^656634955848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656634955848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (841163974560).

656634955848 is an abundant number, since it is smaller than the sum of its proper divisors (1025692993272).

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

656634955848 is a wasteful number, since it uses less digits than its factorization.

656634955848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278558 (or 278554 counting only the distinct ones).

The product of its digits is 746496000, while the sum is 69.

The spelling of 656634955848 in words is "six hundred fifty-six billion, six hundred thirty-four million, nine hundred fifty-five thousand, eight hundred forty-eight".