2117761788 has 24 divisors (see below), whose sum is σ = 4942525392. Its totient is φ = 705766144.

The previous prime is 2117761771. The next prime is 2117761817. The reversal of 2117761788 is 8871677112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46906 + ... + 80222.

It is an arithmetic number, because the mean of its divisors is an integer number (205938558).

Almost surely, 2^2117761788 is an apocalyptic number.

It is an amenable number.

2117761788 is an abundant number, since it is smaller than the sum of its proper divisors (2824763604).

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

2117761788 is a wasteful number, since it uses less digits than its factorization.

2117761788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38621 (or 38619 counting only the distinct ones).

The product of its digits is 263424, while the sum is 48.

The square root of 2117761788 is about 46019.1458851639. The cubic root of 2117761788 is about 1284.1794107857.

The spelling of 2117761788 in words is "two billion, one hundred seventeen million, seven hundred sixty-one thousand, seven hundred eighty-eight".