2117974855 has 8 divisors (see below), whose sum is σ = 2579504112. Its totient is φ = 1669090368.

The previous prime is 2117974853. The next prime is 2117974871. The reversal of 2117974855 is 5584797112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2117974855 - 2¹ = 2117974853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2117974799 and 2117974808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2117974853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3160822 + ... + 3161491.

It is an arithmetic number, because the mean of its divisors is an integer number (322438014).

Almost surely, 2^2117974855 is an apocalyptic number.

2117974855 is a deficient number, since it is larger than the sum of its proper divisors (461529257).

2117974855 is an equidigital number, since it uses as much as digits as its factorization.

2117974855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6322385.

The product of its digits is 705600, while the sum is 49.

The square root of 2117974855 is about 46021.4608090617. The cubic root of 2117974855 is about 1284.2224762335. Note that the first 3 decimals are identical.

The spelling of 2117974855 in words is "two billion, one hundred seventeen million, nine hundred seventy-four thousand, eight hundred fifty-five".