64738016320 has 56 divisors (see below), whose sum is σ = 155371336704. Its totient is φ = 25691291136.

The previous prime is 64738016261. The next prime is 64738016381. The reversal of 64738016320 is 2361083746.

64738016320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 755842 + ... + 837121.

Almost surely, 2^64738016320 is an apocalyptic number.

It is an amenable number.

64738016320 is an abundant number, since it is smaller than the sum of its proper divisors (90633320384).

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

64738016320 is a wasteful number, since it uses less digits than its factorization.

64738016320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593107 (or 1593097 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 64738016320 in words is "sixty-four billion, seven hundred thirty-eight million, sixteen thousand, three hundred twenty".