2155177664 has 14 divisors (see below), whose sum is σ = 4276680804. Its totient is φ = 1077588800.

The previous prime is 2155177649. The next prime is 2155177699. The reversal of 2155177664 is 4667715512.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16837262 + ... + 16837389.

Almost surely, 2^2155177664 is an apocalyptic number.

It is an amenable number.

2155177664 is a deficient number, since it is larger than the sum of its proper divisors (2121503140).

2155177664 is an equidigital number, since it uses as much as digits as its factorization.

2155177664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33674663 (or 33674653 counting only the distinct ones).

The product of its digits is 352800, while the sum is 44.

The square root of 2155177664 is about 46423.8910906873. The cubic root of 2155177664 is about 1291.6981150156.

The spelling of 2155177664 in words is "two billion, one hundred fifty-five million, one hundred seventy-seven thousand, six hundred sixty-four".