64564445700 has 54 divisors (see below), whose sum is σ = 202373670954. Its totient is φ = 17217185280.

The previous prime is 64564445689. The next prime is 64564445711. The reversal of 64564445700 is 754446546.

It is an interprime number because it is at equal distance from previous prime (64564445689) and next prime (64564445711).

It can be written as a sum of positive squares in 3 ways, for example, as 4880978496 + 59683467204 = 69864^2 + 244302^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 35868237 + ... + 35870036.

Almost surely, 2^64564445700 is an apocalyptic number.

64564445700 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64564445700 is an abundant number, since it is smaller than the sum of its proper divisors (137809225254).

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

64564445700 is a wasteful number, since it uses less digits than its factorization.

64564445700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71738293 (or 71738283 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 45.

The spelling of 64564445700 in words is "sixty-four billion, five hundred sixty-four million, four hundred forty-five thousand, seven hundred".