64516312660 has 48 divisors (see below), whose sum is σ = 138608692992. Its totient is φ = 25217830400.

The previous prime is 64516312643. The next prime is 64516312661. The reversal of 64516312660 is 6621361546.

64516312660 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 not an unprimeable number, because it can be changed into a prime (64516312661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40576 + ... + 361495.

It is an arithmetic number, because the mean of its divisors is an integer number (2887681104).

Almost surely, 2^64516312660 is an apocalyptic number.

It is an amenable number.

64516312660 is an abundant number, since it is smaller than the sum of its proper divisors (74092380332).

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

64516312660 is a wasteful number, since it uses less digits than its factorization.

64516312660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402264 (or 402262 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 64516312660 in words is "sixty-four billion, five hundred sixteen million, three hundred twelve thousand, six hundred sixty".