64404163 has 12 divisors (see below), whose sum is σ = 67762408. Its totient is φ = 61205760.

The previous prime is 64404139. The next prime is 64404173. The reversal of 64404163 is 36140446.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-64404163 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64404103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111331 + ... + 111907.

Almost surely, 2^64404163 is an apocalyptic number.

64404163 is a deficient number, since it is larger than the sum of its proper divisors (3358245).

64404163 is a wasteful number, since it uses less digits than its factorization.

64404163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834 (or 811 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 64404163 is about 8025.2204331096. The cubic root of 64404163 is about 400.8402400060.

The spelling of 64404163 in words is "sixty-four million, four hundred four thousand, one hundred sixty-three".