64512616452 has 12 divisors (see below), whose sum is σ = 150529438416. Its totient is φ = 21504205480.

The previous prime is 64512616439. The next prime is 64512616453. The reversal of 64512616452 is 25461621546.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×64512616452² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64512616453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2688025674 + ... + 2688025697.

It is an arithmetic number, because the mean of its divisors is an integer number (12544119868).

Almost surely, 2^64512616452 is an apocalyptic number.

It is an amenable number.

64512616452 is an abundant number, since it is smaller than the sum of its proper divisors (86016821964).

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

64512616452 is a wasteful number, since it uses less digits than its factorization.

64512616452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5376051378 (or 5376051376 counting only the distinct ones).

The product of its digits is 345600, while the sum is 42.

The spelling of 64512616452 in words is "sixty-four billion, five hundred twelve million, six hundred sixteen thousand, four hundred fifty-two".