64623305504 has 48 divisors (see below), whose sum is σ = 134739612000. Its totient is φ = 30404527104.

The previous prime is 64623305477. The next prime is 64623305507. The reversal of 64623305504 is 40550332646.

It is a happy number.

It is a super-2 number, since 2×64623305504² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64623305507) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3417227 + ... + 3436085.

It is an arithmetic number, because the mean of its divisors is an integer number (2807075250).

Almost surely, 2^64623305504 is an apocalyptic number.

It is an amenable number.

64623305504 is an abundant number, since it is smaller than the sum of its proper divisors (70116306496).

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

64623305504 is a wasteful number, since it uses less digits than its factorization.

64623305504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25185 (or 25177 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 38.

The spelling of 64623305504 in words is "sixty-four billion, six hundred twenty-three million, three hundred five thousand, five hundred four".