2191049458173 has 24 divisors (see below), whose sum is σ = 3236605628256. Its totient is φ = 1427914144800.

The previous prime is 2191049458141. The next prime is 2191049458187. The reversal of 2191049458173 is 3718549401912.

2191049458173 is a `hidden beast` number, since 2 + 1 + 9 + 1 + 0 + 494 + 5 + 81 + 73 = 666.

It is not a de Polignac number, because 2191049458173 - 2⁵ = 2191049458141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191049450173) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13789638 + ... + 13947623.

It is an arithmetic number, because the mean of its divisors is an integer number (134858567844).

Almost surely, 2^{2191049458173} is an apocalyptic number.

It is an amenable number.

2191049458173 is a deficient number, since it is larger than the sum of its proper divisors (1045556170083).

2191049458173 is a wasteful number, since it uses less digits than its factorization.

2191049458173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27737465 (or 27737462 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 2191049458173 in words is "two trillion, one hundred ninety-one billion, forty-nine million, four hundred fifty-eight thousand, one hundred seventy-three".