2105198980173 has 16 divisors (see below), whose sum is σ = 3171674548800. Its totient is φ = 1379678426640.

The previous prime is 2105198980123. The next prime is 2105198980187. The reversal of 2105198980173 is 3710898915012.

2105198980173 is a `hidden beast` number, since 21 + 0 + 519 + 8 + 98 + 0 + 17 + 3 = 666.

It is not a de Polignac number, because 2105198980173 - 2⁶ = 2105198980109 is a prime.

It is a super-2 number, since 2×2105198980173² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105198980123) 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, 660763938 + ... + 660767123.

It is an arithmetic number, because the mean of its divisors is an integer number (198229659300).

Almost surely, 2^{2105198980173} is an apocalyptic number.

It is an amenable number.

2105198980173 is a deficient number, since it is larger than the sum of its proper divisors (1066475568627).

2105198980173 is a wasteful number, since it uses less digits than its factorization.

2105198980173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321531129 (or 1321531123 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 54.

The spelling of 2105198980173 in words is "two trillion, one hundred five billion, one hundred ninety-eight million, nine hundred eighty thousand, one hundred seventy-three".