2117858309904 has 80 divisors (see below), whose sum is σ = 5482049126400. Its totient is φ = 704545080960.

The previous prime is 2117858309891. The next prime is 2117858309921. The reversal of 2117858309904 is 4099038587112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120330897 + ... + 120348495.

It is an arithmetic number, because the mean of its divisors is an integer number (68525614080).

Almost surely, 2^{2117858309904} is an apocalyptic number.

2117858309904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2117858309904 is an abundant number, since it is smaller than the sum of its proper divisors (3364190816496).

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

2117858309904 is a wasteful number, since it uses less digits than its factorization.

2117858309904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22468 (or 22462 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 57.

The spelling of 2117858309904 in words is "two trillion, one hundred seventeen billion, eight hundred fifty-eight million, three hundred nine thousand, nine hundred four".