2168785671 has 8 divisors (see below), whose sum is σ = 3114153840. Its totient is φ = 1334637312.

The previous prime is 2168785649. The next prime is 2168785679. The reversal of 2168785671 is 1765878612.

It is a happy number.

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

It is not a de Polignac number, because 2168785671 - 2⁵ = 2168785639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2168785679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27804906 + ... + 27804983.

It is an arithmetic number, because the mean of its divisors is an integer number (389269230).

Almost surely, 2^2168785671 is an apocalyptic number.

2168785671 is a deficient number, since it is larger than the sum of its proper divisors (945368169).

2168785671 is a wasteful number, since it uses less digits than its factorization.

2168785671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55609905.

The product of its digits is 1128960, while the sum is 51.

The square root of 2168785671 is about 46570.2230078405. The cubic root of 2168785671 is about 1294.4110500530.

The spelling of 2168785671 in words is "two billion, one hundred sixty-eight million, seven hundred eighty-five thousand, six hundred seventy-one".