64965716320 has 48 divisors (see below), whose sum is σ = 154027808928. Its totient is φ = 25893790720.

The previous prime is 64965716317. The next prime is 64965716329. The reversal of 64965716320 is 2361756946.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64965716329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 677524 + ... + 767443.

It is an arithmetic number, because the mean of its divisors is an integer number (3208912686).

Almost surely, 2^64965716320 is an apocalyptic number.

It is an amenable number.

64965716320 is an abundant number, since it is smaller than the sum of its proper divisors (89062092608).

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

64965716320 is a wasteful number, since it uses less digits than its factorization.

64965716320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445263 (or 1445255 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 49.

The spelling of 64965716320 in words is "sixty-four billion, nine hundred sixty-five million, seven hundred sixteen thousand, three hundred twenty".