2604663396 has 72 divisors (see below), whose sum is σ = 6775674360. Its totient is φ = 843042816.

The previous prime is 2604663377. The next prime is 2604663403. The reversal of 2604663396 is 6933664062.

It is a happy number.

2604663396 is a `hidden beast` number, since 2 + 6 + 0 + 4 + 6 + 633 + 9 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2387690496 + 216972900 = 48864^2 + 14730^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 766870 + ... + 770258.

Almost surely, 2^2604663396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2604663396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3387837180).

2604663396 is an abundant number, since it is smaller than the sum of its proper divisors (4171010964).

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

2604663396 is a wasteful number, since it uses less digits than its factorization.

2604663396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4013 (or 4008 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 45.

The square root of 2604663396 is about 51035.9030095481. The cubic root of 2604663396 is about 1375.8904902313.

The spelling of 2604663396 in words is "two billion, six hundred four million, six hundred sixty-three thousand, three hundred ninety-six".