64682448680 has 64 divisors (see below), whose sum is σ = 148409606160. Its totient is φ = 25362874368.

The previous prime is 64682448679. The next prime is 64682448703. The reversal of 64682448680 is 8684428646.

It can be written as a sum of positive squares in 8 ways, for example, as 18420461284 + 46261987396 = 135722^2 + 215086^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2558984 + ... + 2584136.

Almost surely, 2^64682448680 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 64682448680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74204803080).

64682448680 is an abundant number, since it is smaller than the sum of its proper divisors (83727157480).

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

64682448680 is a wasteful number, since it uses less digits than its factorization.

64682448680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26430 (or 26426 counting only the distinct ones).

The product of its (nonzero) digits is 14155776, while the sum is 56.

The spelling of 64682448680 in words is "sixty-four billion, six hundred eighty-two million, four hundred forty-eight thousand, six hundred eighty".