2117760381 has 48 divisors (see below), whose sum is σ = 3493601280. Its totient is φ = 1224468000.

The previous prime is 2117760377. The next prime is 2117760383. The reversal of 2117760381 is 1830677112.

2117760381 is a `hidden beast` number, since 211 + 7 + 7 + 60 + 381 = 666.

It is not a de Polignac number, because 2117760381 - 2² = 2117760377 is a prime.

It is a super-2 number, since 2×2117760381² = 8969818062666530322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2117760383) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 213040 + ... + 222758.

It is an arithmetic number, because the mean of its divisors is an integer number (72783360).

Almost surely, 2^2117760381 is an apocalyptic number.

It is an amenable number.

2117760381 is a deficient number, since it is larger than the sum of its proper divisors (1375840899).

2117760381 is a wasteful number, since it uses less digits than its factorization.

2117760381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9838 (or 9835 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 2117760381 is about 46019.1305980459. The cubic root of 2117760381 is about 1284.1791263910.

The spelling of 2117760381 in words is "two billion, one hundred seventeen million, seven hundred sixty thousand, three hundred eighty-one".