64426864064 has 28 divisors (see below), whose sum is σ = 127868248200. Its totient is φ = 32208092928.

The previous prime is 64426864057. The next prime is 64426864067. The reversal of 64426864064 is 46046862446.

It is a super-2 number, since 2×64426864064² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64426864067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320927 + ... + 481505.

It is an arithmetic number, because the mean of its divisors is an integer number (4566723150).

Almost surely, 2^64426864064 is an apocalyptic number.

64426864064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

64426864064 is a deficient number, since it is larger than the sum of its proper divisors (63441384136).

64426864064 is a wasteful number, since it uses less digits than its factorization.

64426864064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166860 (or 166850 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 50.

The spelling of 64426864064 in words is "sixty-four billion, four hundred twenty-six million, eight hundred sixty-four thousand, sixty-four".