5644631646 has 24 divisors (see below), whose sum is σ = 12305072520. Its totient is φ = 1869999696.

The previous prime is 5644631623. The next prime is 5644631677. The reversal of 5644631646 is 6461364465.

5644631646 is a `hidden beast` number, since 5 + 6 + 4 + 4 + 631 + 6 + 4 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 959001 + ... + 964868.

It is an arithmetic number, because the mean of its divisors is an integer number (512711355).

Almost surely, 2^5644631646 is an apocalyptic number.

5644631646 is an abundant number, since it is smaller than the sum of its proper divisors (6660440874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5644631646 is a wasteful number, since it uses less digits than its factorization.

5644631646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1924040 (or 1924037 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 45.

The square root of 5644631646 is about 75130.7636457929. The cubic root of 5644631646 is about 1780.5132179594.

The spelling of 5644631646 in words is "five billion, six hundred forty-four million, six hundred thirty-one thousand, six hundred forty-six".