64332515 has 16 divisors (see below), whose sum is σ = 85074528. Its totient is φ = 46400256.

The previous prime is 64332509. The next prime is 64332523. The reversal of 64332515 is 51523346.

It is a cyclic number.

It is not a de Polignac number, because 64332515 - 2⁶ = 64332451 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8714 + ... + 14303.

It is an arithmetic number, because the mean of its divisors is an integer number (5317158).

Almost surely, 2^64332515 is an apocalyptic number.

64332515 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

64332515 is a deficient number, since it is larger than the sum of its proper divisors (20742013).

64332515 is a wasteful number, since it uses less digits than its factorization.

64332515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23078.

The product of its digits is 10800, while the sum is 29.

The square root of 64332515 is about 8020.7552636893. The cubic root of 64332515 is about 400.6915433139.

The spelling of 64332515 in words is "sixty-four million, three hundred thirty-two thousand, five hundred fifteen".