64372515 has 16 divisors (see below), whose sum is σ = 107474688. Its totient is φ = 32839136.

The previous prime is 64372493. The next prime is 64372537. The reversal of 64372515 is 51527346.

It is an interprime number because it is at equal distance from previous prime (64372493) and next prime (64372537).

It is a cyclic number.

It is not a de Polignac number, because 64372515 - 2¹³ = 64364323 is a prime.

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, 92949 + ... + 93638.

It is an arithmetic number, because the mean of its divisors is an integer number (6717168).

Almost surely, 2^64372515 is an apocalyptic number.

64372515 is a deficient number, since it is larger than the sum of its proper divisors (43102173).

64372515 is a wasteful number, since it uses less digits than its factorization.

64372515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186618.

The product of its digits is 25200, while the sum is 33.

The square root of 64372515 is about 8023.2484069733. The cubic root of 64372515 is about 400.7745720439.

The spelling of 64372515 in words is "sixty-four million, three hundred seventy-two thousand, five hundred fifteen".