2168909604 has 18 divisors (see below), whose sum is σ = 5482521590. Its totient is φ = 722969856.

The previous prime is 2168909599. The next prime is 2168909647. The reversal of 2168909604 is 4069098612.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2156673600 + 12236004 = 46440^2 + 3498^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 2168909604.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30123709 + ... + 30123780.

Almost surely, 2^2168909604 is an apocalyptic number.

It is an amenable number.

2168909604 is an abundant number, since it is smaller than the sum of its proper divisors (3313611986).

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

2168909604 is a wasteful number, since it uses less digits than its factorization.

2168909604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60247499 (or 60247494 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 2168909604 is about 46571.5535922949. The cubic root of 2168909604 is about 1294.4357055074.

The spelling of 2168909604 in words is "two billion, one hundred sixty-eight million, nine hundred nine thousand, six hundred four".