635690479204 has 27 divisors (see below), whose sum is σ = 1222818526713. Its totient is φ = 288942244800.

The previous prime is 635690479187. The next prime is 635690479213. The reversal of 635690479204 is 402974096536.

The square root of 635690479204 is 797302.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4237749604 + 631452729600 = 65098^2 + 794640^2 .

It is a super-2 number, since 2×635690479204² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 17522524 + ... + 17558764.

Almost surely, 2^635690479204 is an apocalyptic number.

635690479204 is the 797302-nd square number.

It is an amenable number.

635690479204 is a deficient number, since it is larger than the sum of its proper divisors (587128047509).

635690479204 is an frugal number, since it uses more digits than its factorization.

635690479204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72508 (or 36254 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 55.

The spelling of 635690479204 in words is "six hundred thirty-five billion, six hundred ninety million, four hundred seventy-nine thousand, two hundred four".