64955865 has 16 divisors (see below), whose sum is σ = 111924288. Its totient is φ = 31978176.

The previous prime is 64955857. The next prime is 64955867. The reversal of 64955865 is 56855946.

It is not a de Polignac number, because 64955865 - 2³ = 64955857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64955867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166359 + ... + 166748.

It is an arithmetic number, because the mean of its divisors is an integer number (6995268).

Almost surely, 2^64955865 is an apocalyptic number.

64955865 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64955865 is a deficient number, since it is larger than the sum of its proper divisors (46968423).

64955865 is a wasteful number, since it uses less digits than its factorization.

64955865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333128.

The product of its digits is 1296000, while the sum is 48.

The square root of 64955865 is about 8059.5201470063. The cubic root of 64955865 is about 401.9815528279.

The spelling of 64955865 in words is "sixty-four million, nine hundred fifty-five thousand, eight hundred sixty-five".