64501715 has 4 divisors (see below), whose sum is σ = 77402064. Its totient is φ = 51601368.

The previous prime is 64501709. The next prime is 64501721. The reversal of 64501715 is 51710546.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51710546 = 2 ⋅25855273.

It is an interprime number because it is at equal distance from previous prime (64501709) and next prime (64501721).

It is a cyclic number.

It is not a de Polignac number, because 64501715 - 2¹⁴ = 64485331 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6450167 + ... + 6450176.

It is an arithmetic number, because the mean of its divisors is an integer number (19350516).

Almost surely, 2^64501715 is an apocalyptic number.

64501715 is a deficient number, since it is larger than the sum of its proper divisors (12900349).

64501715 is a wasteful number, since it uses less digits than its factorization.

64501715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12900348.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 64501715 is about 8031.2959726311. The cubic root of 64501715 is about 401.0425201024.

The spelling of 64501715 in words is "sixty-four million, five hundred one thousand, seven hundred fifteen".