2163920086491 has 16 divisors (see below), whose sum is σ = 2889030434304. Its totient is φ = 1440711929664.

The previous prime is 2163920086417. The next prime is 2163920086513. The reversal of 2163920086491 is 1946800293612.

It is not a de Polignac number, because 2163920086491 - 2¹⁷ = 2163919955419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2163920086091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27235375 + ... + 27314711.

It is an arithmetic number, because the mean of its divisors is an integer number (180564402144).

Almost surely, 2^{2163920086491} is an apocalyptic number.

2163920086491 is a deficient number, since it is larger than the sum of its proper divisors (725110347813).

2163920086491 is a wasteful number, since it uses less digits than its factorization.

2163920086491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91210.

The product of its (nonzero) digits is 1119744, while the sum is 51.

The spelling of 2163920086491 in words is "two trillion, one hundred sixty-three billion, nine hundred twenty million, eighty-six thousand, four hundred ninety-one".