5638699520 has 40 divisors (see below), whose sum is σ = 13519669284. Its totient is φ = 2255478784.

The previous prime is 5638699511. The next prime is 5638699571. The reversal of 5638699520 is 259968365.

It can be written as a sum of positive squares in 2 ways, for example, as 5117399296 + 521300224 = 71536^2 + 22832^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1098749 + ... + 1103868.

Almost surely, 2^5638699520 is an apocalyptic number.

It is an amenable number.

5638699520 is an abundant number, since it is smaller than the sum of its proper divisors (7880969764).

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

5638699520 is an equidigital number, since it uses as much as digits as its factorization.

5638699520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202640 (or 2202624 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 53.

The square root of 5638699520 is about 75091.2745929912. The cubic root of 5638699520 is about 1779.8892663513.

The spelling of 5638699520 in words is "five billion, six hundred thirty-eight million, six hundred ninety-nine thousand, five hundred twenty".