1980155089017 has 16 divisors (see below), whose sum is σ = 3352643537280. Its totient is φ = 1131517193616.

The previous prime is 1980155089013. The next prime is 1980155089039. The reversal of 1980155089017 is 7109805510891.

It is a happy number.

1980155089017 is a `hidden beast` number, since 1 + 9 + 8 + 0 + 1 + 550 + 89 + 0 + 1 + 7 = 666.

It is not a de Polignac number, because 1980155089017 - 2² = 1980155089013 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1980155089013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5238505338 + ... + 5238505715.

It is an arithmetic number, because the mean of its divisors is an integer number (209540221080).

Almost surely, 2^{1980155089017} is an apocalyptic number.

It is an amenable number.

1980155089017 is a deficient number, since it is larger than the sum of its proper divisors (1372488448263).

1980155089017 is a wasteful number, since it uses less digits than its factorization.

1980155089017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10477011069 (or 10477011063 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 54.

The spelling of 1980155089017 in words is "one trillion, nine hundred eighty billion, one hundred fifty-five million, eighty-nine thousand, seventeen".