1980173690291 has 16 divisors (see below), whose sum is σ = 2028636825600. Its totient is φ = 1931821708320.

The previous prime is 1980173690263. The next prime is 1980173690317. The reversal of 1980173690291 is 1920963710891.

It is a de Polignac number, because none of the positive numbers 2^k-1980173690291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1980173690221) 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, 140600336 + ... + 140614418.

It is an arithmetic number, because the mean of its divisors is an integer number (126789801600).

Almost surely, 2^{1980173690291} is an apocalyptic number.

1980173690291 is a deficient number, since it is larger than the sum of its proper divisors (48463135309).

1980173690291 is a wasteful number, since it uses less digits than its factorization.

1980173690291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17786.

The product of its (nonzero) digits is 1469664, while the sum is 56.

The spelling of 1980173690291 in words is "one trillion, nine hundred eighty billion, one hundred seventy-three million, six hundred ninety thousand, two hundred ninety-one".