64097865 has 32 divisors (see below), whose sum is σ = 122720640. Its totient is φ = 31555008.

The previous prime is 64097857. The next prime is 64097899. The reversal of 64097865 is 56879046.

It is not a de Polignac number, because 64097865 - 2³ = 64097857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 64097865.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16507 + ... + 20016.

It is an arithmetic number, because the mean of its divisors is an integer number (3835020).

Almost surely, 2^64097865 is an apocalyptic number.

64097865 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64097865 is a deficient number, since it is larger than the sum of its proper divisors (58622775).

64097865 is a wasteful number, since it uses less digits than its factorization.

64097865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36550 (or 36544 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 64097865 is about 8006.1142260150. The cubic root of 64097865 is about 400.2037815817.

The spelling of 64097865 in words is "sixty-four million, ninety-seven thousand, eight hundred sixty-five".