64117666488 has 64 divisors (see below), whose sum is σ = 160670764800. Its totient is φ = 21322414080.

The previous prime is 64117666477. The next prime is 64117666519. The reversal of 64117666488 is 88466671146.

It is a super-2 number, since 2×64117666488² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30343320 + ... + 30345432.

It is an arithmetic number, because the mean of its divisors is an integer number (2510480700).

Almost surely, 2^64117666488 is an apocalyptic number.

It is an amenable number.

64117666488 is an abundant number, since it is smaller than the sum of its proper divisors (96553098312).

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

64117666488 is a wasteful number, since it uses less digits than its factorization.

64117666488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4492 (or 4488 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 57.

The spelling of 64117666488 in words is "sixty-four billion, one hundred seventeen million, six hundred sixty-six thousand, four hundred eighty-eight".