64651164 has 12 divisors (see below), whose sum is σ = 150852744. Its totient is φ = 21550384.

The previous prime is 64651141. The next prime is 64651193. The reversal of 64651164 is 46115646.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

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, 2693787 + ... + 2693810.

It is an arithmetic number, because the mean of its divisors is an integer number (12571062).

Almost surely, 2^64651164 is an apocalyptic number.

It is an amenable number.

64651164 is an abundant number, since it is smaller than the sum of its proper divisors (86201580).

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

64651164 is a wasteful number, since it uses less digits than its factorization.

64651164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5387604 (or 5387602 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 64651164 is about 8040.5947541211. The cubic root of 64651164 is about 401.3520166454.

It can be divided in two parts, 6465 and 1164, that multiplied together give a triangular number (7525260 = T₃₈₇₉).

The spelling of 64651164 in words is "sixty-four million, six hundred fifty-one thousand, one hundred sixty-four".