2171946604 has 12 divisors (see below), whose sum is σ = 3801476224. Its totient is φ = 1085810544.

The previous prime is 2171946599. The next prime is 2171946611. The reversal of 2171946604 is 4066491712.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

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, 7692 + ... + 66355.

Almost surely, 2^2171946604 is an apocalyptic number.

It is an amenable number.

2171946604 is a deficient number, since it is larger than the sum of its proper divisors (1629529620).

2171946604 is a wasteful number, since it uses less digits than its factorization.

2171946604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81384 (or 81382 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 2171946604 is about 46604.1479269818. The cubic root of 2171946604 is about 1295.0395984771.

The spelling of 2171946604 in words is "two billion, one hundred seventy-one million, nine hundred forty-six thousand, six hundred four".