2165981671298 has 8 divisors (see below), whose sum is σ = 3250112106000. Its totient is φ = 1082610969300.

The previous prime is 2165981671277. The next prime is 2165981671331. The reversal of 2165981671298 is 8921761895612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189926048 + ... + 189937451.

It is an arithmetic number, because the mean of its divisors is an integer number (406264013250).

Almost surely, 2^{2165981671298} is an apocalyptic number.

2165981671298 is a deficient number, since it is larger than the sum of its proper divisors (1084130434702).

2165981671298 is a wasteful number, since it uses less digits than its factorization.

2165981671298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379866352.

The product of its digits is 26127360, while the sum is 65.

The spelling of 2165981671298 in words is "two trillion, one hundred sixty-five billion, nine hundred eighty-one million, six hundred seventy-one thousand, two hundred ninety-eight".