64656614256 has 160 divisors (see below), whose sum is σ = 187083359232. Its totient is φ = 19112647680.

The previous prime is 64656614177. The next prime is 64656614279. The reversal of 64656614256 is 65241665646.

It is a junction number, because it is equal to n+sod(n) for n = 64656614199 and 64656614208.

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 31 ways as a sum of consecutive naturals, for example, 1617001 + ... + 1656503.

Almost surely, 2^64656614256 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 64656614256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93541679616).

64656614256 is an abundant number, since it is smaller than the sum of its proper divisors (122426744976).

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

64656614256 is a wasteful number, since it uses less digits than its factorization.

64656614256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39631 (or 39625 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 51.

The spelling of 64656614256 in words is "sixty-four billion, six hundred fifty-six million, six hundred fourteen thousand, two hundred fifty-six".