2165981671362 has 16 divisors (see below), whose sum is σ = 4332504190752. Its totient is φ = 721903749120.

The previous prime is 2165981671361. The next prime is 2165981671391. The reversal of 2165981671362 is 2631761895612.

It is a super-2 number, since 2×2165981671362² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2165981671361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22483263 + ... + 22579394.

It is an arithmetic number, because the mean of its divisors is an integer number (270781511922).

Almost surely, 2^{2165981671362} is an apocalyptic number.

2165981671362 is an abundant number, since it is smaller than the sum of its proper divisors (2166522519390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2165981671362 is a wasteful number, since it uses less digits than its factorization.

2165981671362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45070673.

The product of its digits is 6531840, while the sum is 57.

The spelling of 2165981671362 in words is "two trillion, one hundred sixty-five billion, nine hundred eighty-one million, six hundred seventy-one thousand, three hundred sixty-two".