2155808160 has 144 divisors (see below), whose sum is σ = 8025544800. Its totient is φ = 522616320.

The previous prime is 2155808141. The next prime is 2155808183. The reversal of 2155808160 is 618085512.

2155808160 is a `hidden beast` number, since 2 + 15 + 580 + 8 + 1 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 52210 + ... + 83889.

It is an arithmetic number, because the mean of its divisors is an integer number (55732950).

Almost surely, 2^2155808160 is an apocalyptic number.

2155808160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155808160 is an abundant number, since it is smaller than the sum of its proper divisors (5869736640).

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

2155808160 is a wasteful number, since it uses less digits than its factorization.

2155808160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136131 (or 136120 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

The square root of 2155808160 is about 46430.6812355796. The cubic root of 2155808160 is about 1291.8240645839.

The spelling of 2155808160 in words is "two billion, one hundred fifty-five million, eight hundred eight thousand, one hundred sixty".