65426978688 has 256 divisors, whose sum is σ = 183634516800. Its totient is φ = 20617625600.

The previous prime is 65426978653. The next prime is 65426978693. The reversal of 65426978688 is 88687962456.

65426978688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74264008 + ... + 74264888.

Almost surely, 2^65426978688 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 65426978688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91817258400).

65426978688 is an abundant number, since it is smaller than the sum of its proper divisors (118207538112).

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

65426978688 is a wasteful number, since it uses less digits than its factorization.

65426978688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081 (or 1069 counting only the distinct ones).

The product of its digits is 278691840, while the sum is 69.

The spelling of 65426978688 in words is "sixty-five billion, four hundred twenty-six million, nine hundred seventy-eight thousand, six hundred eighty-eight".