64685715 has 8 divisors (see below), whose sum is σ = 103497168. Its totient is φ = 34499040.

The previous prime is 64685713. The next prime is 64685743. The reversal of 64685715 is 51758646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64685715 - 2¹ = 64685713 is a prime.

It is a super-2 number, since 2×64685715² = 8368483450122450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64685713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2156176 + ... + 2156205.

It is an arithmetic number, because the mean of its divisors is an integer number (12937146).

Almost surely, 2^64685715 is an apocalyptic number.

64685715 is a deficient number, since it is larger than the sum of its proper divisors (38811453).

64685715 is a wasteful number, since it uses less digits than its factorization.

64685715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4312389.

The product of its digits is 201600, while the sum is 42.

The square root of 64685715 is about 8042.7430022350. The cubic root of 64685715 is about 401.4235010194.

The spelling of 64685715 in words is "sixty-four million, six hundred eighty-five thousand, seven hundred fifteen".