64689852964 has 45 divisors (see below), whose sum is σ = 124645790955. Its totient is φ = 29376501000.

The previous prime is 64689852961. The next prime is 64689852971. The reversal of 64689852964 is 46925898646.

The square root of 64689852964 is 254342.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64689852964.

It is not an unprimeable number, because it can be changed into a prime (64689852961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 61550239 + ... + 61551289.

Almost surely, 2^64689852964 is an apocalyptic number.

64689852964 is the 254342-nd square number.

It is an amenable number.

64689852964 is a deficient number, since it is larger than the sum of its proper divisors (59955937991).

64689852964 is an frugal number, since it uses more digits than its factorization.

64689852964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150 (or 1064 counting only the distinct ones).

The product of its digits is 179159040, while the sum is 67.

The spelling of 64689852964 in words is "sixty-four billion, six hundred eighty-nine million, eight hundred fifty-two thousand, nine hundred sixty-four".