64861895 has 16 divisors (see below), whose sum is σ = 89149248. Its totient is φ = 44378880.

The previous prime is 64861891. The next prime is 64861913. The reversal of 64861895 is 59816846.

It is not a de Polignac number, because 64861895 - 2² = 64861891 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64861891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16457 + ... + 20013.

It is an arithmetic number, because the mean of its divisors is an integer number (5571828).

Almost surely, 2^64861895 is an apocalyptic number.

64861895 is a deficient number, since it is larger than the sum of its proper divisors (24287353).

64861895 is a wasteful number, since it uses less digits than its factorization.

64861895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4090.

The product of its digits is 414720, while the sum is 47.

The square root of 64861895 is about 8053.6882855000. The cubic root of 64861895 is about 401.7876137749.

It can be divided in two parts, 64861 and 895, that added together give a palindrome (65756).

The spelling of 64861895 in words is "sixty-four million, eight hundred sixty-one thousand, eight hundred ninety-five".