64440662604 has 24 divisors (see below), whose sum is σ = 159206343408. Its totient is φ = 20216678400.

The previous prime is 64440662591. The next prime is 64440662641. The reversal of 64440662604 is 40626604446.

64440662604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157942597 + ... + 157943004.

It is an arithmetic number, because the mean of its divisors is an integer number (6633597642).

Almost surely, 2^64440662604 is an apocalyptic number.

It is an amenable number.

64440662604 is an abundant number, since it is smaller than the sum of its proper divisors (94765680804).

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

64440662604 is a wasteful number, since it uses less digits than its factorization.

64440662604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315885625 (or 315885623 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 64440662604 in words is "sixty-four billion, four hundred forty million, six hundred sixty-two thousand, six hundred four".