2118975660 has 48 divisors (see below), whose sum is σ = 6592370400. Its totient is φ = 565060032.

The previous prime is 2118975647. The next prime is 2118975709. The reversal of 2118975660 is 665798112.

2118975660 is a `hidden beast` number, since 2 + 1 + 1 + 89 + 7 + 566 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1961475 + ... + 1962554.

It is an arithmetic number, because the mean of its divisors is an integer number (137341050).

Almost surely, 2^2118975660 is an apocalyptic number.

2118975660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2118975660 is an abundant number, since it is smaller than the sum of its proper divisors (4473394740).

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

2118975660 is a wasteful number, since it uses less digits than its factorization.

2118975660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3924047 (or 3924039 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 2118975660 is about 46032.3327673061. The cubic root of 2118975660 is about 1284.4247219283.

The spelling of 2118975660 in words is "two billion, one hundred eighteen million, nine hundred seventy-five thousand, six hundred sixty".