64500520716 has 18 divisors (see below), whose sum is σ = 163042983012. Its totient is φ = 21500173560.

The previous prime is 64500520691. The next prime is 64500520751. The reversal of 64500520716 is 61702500546.

It is a happy number.

64500520716 is a `hidden beast` number, since 64 + 5 + 0 + 0 + 520 + 71 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1791681131 = 64500520716 / (6 + 4 + 5 + 0 + 0 + 5 + 2 + 0 + 7 + 1 + 6).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 895840530 + ... + 895840601.

Almost surely, 2^64500520716 is an apocalyptic number.

It is an amenable number.

64500520716 is an abundant number, since it is smaller than the sum of its proper divisors (98542462296).

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

64500520716 is a wasteful number, since it uses less digits than its factorization.

64500520716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791681141 (or 1791681136 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The spelling of 64500520716 in words is "sixty-four billion, five hundred million, five hundred twenty thousand, seven hundred sixteen".