426644163 has 24 divisors (see below), whose sum is σ = 683691840. Its totient is φ = 254186160.

The previous prime is 426644147. The next prime is 426644171. The reversal of 426644163 is 361446624.

426644163 is a `hidden beast` number, since 4 + 2 + 6 + 644 + 1 + 6 + 3 = 666.

It is not a de Polignac number, because 426644163 - 2⁴ = 426644147 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (426644863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30681 + ... + 42362.

It is an arithmetic number, because the mean of its divisors is an integer number (28487160).

Almost surely, 2^426644163 is an apocalyptic number.

426644163 is a deficient number, since it is larger than the sum of its proper divisors (257047677).

426644163 is a wasteful number, since it uses less digits than its factorization.

426644163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73119 (or 73116 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 426644163 is about 20655.3664455511. The cubic root of 426644163 is about 752.8155873964.

The spelling of 426644163 in words is "four hundred twenty-six million, six hundred forty-four thousand, one hundred sixty-three".