1980108312065 has 32 divisors (see below), whose sum is σ = 2578816504320. Its totient is φ = 1450887572736.

The previous prime is 1980108312053. The next prime is 1980108312067. The reversal of 1980108312065 is 5602138010891.

It is a cyclic number.

It is not a de Polignac number, because 1980108312065 - 2²⁰ = 1980107263489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1980108312067) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6342296 + ... + 6647174.

It is an arithmetic number, because the mean of its divisors is an integer number (80588015760).

Almost surely, 2^{1980108312065} is an apocalyptic number.

It is an amenable number.

1980108312065 is a deficient number, since it is larger than the sum of its proper divisors (598708192255).

1980108312065 is a wasteful number, since it uses less digits than its factorization.

1980108312065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305673.

The product of its (nonzero) digits is 103680, while the sum is 44.

The spelling of 1980108312065 in words is "one trillion, nine hundred eighty billion, one hundred eight million, three hundred twelve thousand, sixty-five".