64913867524 has 81 divisors (see below), whose sum is σ = 128742572511. Its totient is φ = 28617114240.

The previous prime is 64913867483. The next prime is 64913867527. The reversal of 64913867524 is 42576831946.

The square root of 64913867524 is 254782.

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

It can be written as a sum of positive squares in 4 ways, for example, as 3983881924 + 60929985600 = 63118^2 + 246840^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64913867527) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 207392392 + ... + 207392704.

Almost surely, 2^64913867524 is an apocalyptic number.

64913867524 is the 254782-nd square number.

It is an amenable number.

64913867524 is a deficient number, since it is larger than the sum of its proper divisors (63828704987).

64913867524 is a wasteful number, since it uses less digits than its factorization.

64913867524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726 (or 363 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 55.

The spelling of 64913867524 in words is "sixty-four billion, nine hundred thirteen million, eight hundred sixty-seven thousand, five hundred twenty-four".