636960417604 has 81 divisors (see below), whose sum is σ = 1311181639677. Its totient is φ = 269961437088.

The previous prime is 636960417601. The next prime is 636960417619. The reversal of 636960417604 is 406714069636.

The square root of 636960417604 is 798098.

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., 443958355204 + 193002062400 = 666302^2 + 439320^2 .

It is not an unprimeable number, because it can be changed into a prime (636960417601) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1217897287 + ... + 1217897809.

Almost surely, 2^636960417604 is an apocalyptic number.

636960417604 is the 798098-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 636960417604

636960417604 is an abundant number, since it is smaller than the sum of its proper divisors (674221222073).

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

636960417604 is an equidigital number, since it uses as much as digits as its factorization.

636960417604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 52.

The spelling of 636960417604 in words is "six hundred thirty-six billion, nine hundred sixty million, four hundred seventeen thousand, six hundred four".