64718864 has 80 divisors (see below), whose sum is σ = 159811200. Its totient is φ = 24717312.

The previous prime is 64718861. The next prime is 64718867. The reversal of 64718864 is 46881746.

It is an interprime number because it is at equal distance from previous prime (64718861) and next prime (64718867).

It is not an unprimeable number, because it can be changed into a prime (64718861) 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 15 ways as a sum of consecutive naturals, for example, 35282 + ... + 37070.

It is an arithmetic number, because the mean of its divisors is an integer number (1997640).

Almost surely, 2^64718864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64718864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79905600).

64718864 is an abundant number, since it is smaller than the sum of its proper divisors (95092336).

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

64718864 is a wasteful number, since it uses less digits than its factorization.

64718864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840 (or 1834 counting only the distinct ones).

The product of its digits is 258048, while the sum is 44.

The square root of 64718864 is about 8044.8035401742. The cubic root of 64718864 is about 401.4920607996.

The spelling of 64718864 in words is "sixty-four million, seven hundred eighteen thousand, eight hundred sixty-four".