2117358664 has 8 divisors (see below), whose sum is σ = 3970047510. Its totient is φ = 1058679328.

The previous prime is 2117358641. The next prime is 2117358671. The reversal of 2117358664 is 4668537112.

It can be written as a sum of positive squares in only one way, i.e., 1665456100 + 451902564 = 40810^2 + 21258^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 2117358664.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132334909 + ... + 132334924.

Almost surely, 2^2117358664 is an apocalyptic number.

It is an amenable number.

2117358664 is a deficient number, since it is larger than the sum of its proper divisors (1852688846).

2117358664 is a wasteful number, since it uses less digits than its factorization.

2117358664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264669839 (or 264669835 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The square root of 2117358664 is about 46014.7657171043. The cubic root of 2117358664 is about 1284.0979228055.

The spelling of 2117358664 in words is "two billion, one hundred seventeen million, three hundred fifty-eight thousand, six hundred sixty-four".