5644020465 has 20 divisors (see below), whose sum is σ = 10117430004. Its totient is φ = 3010144032.

The previous prime is 5644020443. The next prime is 5644020479. The reversal of 5644020465 is 5640204465.

5644020465 is a `hidden beast` number, since 5 + 6 + 440 + 204 + 6 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2641857201 + 3002163264 = 51399^2 + 54792^2 .

It is not a de Polignac number, because 5644020465 - 2¹⁰ = 5644019441 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6967522 + ... + 6968331.

Almost surely, 2^5644020465 is an apocalyptic number.

It is an amenable number.

5644020465 is a deficient number, since it is larger than the sum of its proper divisors (4473409539).

5644020465 is a wasteful number, since it uses less digits than its factorization.

5644020465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13935870 (or 13935861 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The square root of 5644020465 is about 75126.6960873430. The cubic root of 5644020465 is about 1780.4489530557.

The spelling of 5644020465 in words is "five billion, six hundred forty-four million, twenty thousand, four hundred sixty-five".