2153660172 has 12 divisors (see below), whose sum is σ = 5025207096. Its totient is φ = 717886720.

The previous prime is 2153660167. The next prime is 2153660183. The reversal of 2153660172 is 2710663512.

It is a tau number, because it is divible by the number of its divisors (12).

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, 89735829 + ... + 89735852.

It is an arithmetic number, because the mean of its divisors is an integer number (418767258).

Almost surely, 2^2153660172 is an apocalyptic number.

It is an amenable number.

2153660172 is an abundant number, since it is smaller than the sum of its proper divisors (2871546924).

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

2153660172 is a wasteful number, since it uses less digits than its factorization.

2153660172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179471688 (or 179471686 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 2153660172 is about 46407.5443435655. The cubic root of 2153660172 is about 1291.3948760106.

The spelling of 2153660172 in words is "two billion, one hundred fifty-three million, six hundred sixty thousand, one hundred seventy-two".