64411685 has 16 divisors (see below), whose sum is σ = 83616624. Its totient is φ = 47350272.

The previous prime is 64411679. The next prime is 64411687. The reversal of 64411685 is 58611446.

It can be written as a sum of positive squares in 8 ways, for example, as 23872996 + 40538689 = 4886^2 + 6367^2 .

It is a cyclic number.

It is not a de Polignac number, because 64411685 - 2⁶ = 64411621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64411687) 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, 13019 + ... + 17271.

It is an arithmetic number, because the mean of its divisors is an integer number (5226039).

Almost surely, 2^64411685 is an apocalyptic number.

64411685 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64411685 is a deficient number, since it is larger than the sum of its proper divisors (19204939).

64411685 is a wasteful number, since it uses less digits than its factorization.

64411685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4504.

The product of its digits is 23040, while the sum is 35.

The square root of 64411685 is about 8025.6890669898. The cubic root of 64411685 is about 400.8558446024.

The spelling of 64411685 in words is "sixty-four million, four hundred eleven thousand, six hundred eighty-five".