2117681516 has 6 divisors (see below), whose sum is σ = 3705942660. Its totient is φ = 1058840756.

The previous prime is 2117681497. The next prime is 2117681521. The reversal of 2117681516 is 6151867112.

It is a self number, because there is not a number n which added to its sum of digits gives 2117681516.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 264710186 + ... + 264710193.

It is an arithmetic number, because the mean of its divisors is an integer number (617657110).

Almost surely, 2^2117681516 is an apocalyptic number.

It is an amenable number.

2117681516 is a deficient number, since it is larger than the sum of its proper divisors (1588261144).

2117681516 is a wasteful number, since it uses less digits than its factorization.

2117681516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529420383 (or 529420381 counting only the distinct ones).

The product of its digits is 20160, while the sum is 38.

The square root of 2117681516 is about 46018.2737181655. The cubic root of 2117681516 is about 1284.1631853297.

The spelling of 2117681516 in words is "two billion, one hundred seventeen million, six hundred eighty-one thousand, five hundred sixteen".