64465515 has 24 divisors (see below), whose sum is σ = 113319648. Its totient is φ = 33895680.

The previous prime is 64465451. The next prime is 64465589. The reversal of 64465515 is 51556446.

64465515 is a `hidden beast` number, since 64 + 46 + 551 + 5 = 666.

It is not a de Polignac number, because 64465515 - 2⁶ = 64465451 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 64465515.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 6894 + ... + 13283.

It is an arithmetic number, because the mean of its divisors is an integer number (4721652).

Almost surely, 2^64465515 is an apocalyptic number.

64465515 is a deficient number, since it is larger than the sum of its proper divisors (48854133).

64465515 is a wasteful number, since it uses less digits than its factorization.

64465515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20259 (or 20256 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 64465515 is about 8029.0419727387. The cubic root of 64465515 is about 400.9674809814.

It can be divided in two parts, 64465 and 515, that added together give a triangular number (64980 = T₃₆₀).

The spelling of 64465515 in words is "sixty-four million, four hundred sixty-five thousand, five hundred fifteen".