64055555664 has 20 divisors (see below), whose sum is σ = 165476852256. Its totient is φ = 21351851872.

The previous prime is 64055555659. The next prime is 64055555677. The reversal of 64055555664 is 46655555046.

It is a super-2 number, since 2×64055555664² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 667245324 + ... + 667245419.

Almost surely, 2^64055555664 is an apocalyptic number.

It is an amenable number.

64055555664 is an abundant number, since it is smaller than the sum of its proper divisors (101421296592).

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

64055555664 is a wasteful number, since it uses less digits than its factorization.

64055555664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334490754 (or 1334490748 counting only the distinct ones).

The product of its (nonzero) digits is 10800000, while the sum is 51.

The spelling of 64055555664 in words is "sixty-four billion, fifty-five million, five hundred fifty-five thousand, six hundred sixty-four".