2161641631146 has 32 divisors (see below), whose sum is σ = 4365214027200. Its totient is φ = 713587451136.

The previous prime is 2161641631129. The next prime is 2161641631153. The reversal of 2161641631146 is 6411361461612.

It is a junction number, because it is equal to n+sod(n) for n = 2161641631098 and 2161641631107.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3286176 + ... + 3888731.

It is an arithmetic number, because the mean of its divisors is an integer number (136412938350).

Almost surely, 2^{2161641631146} is an apocalyptic number.

2161641631146 is an abundant number, since it is smaller than the sum of its proper divisors (2203572396054).

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

2161641631146 is a wasteful number, since it uses less digits than its factorization.

2161641631146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7175398.

The product of its digits is 124416, while the sum is 42.

The spelling of 2161641631146 in words is "two trillion, one hundred sixty-one billion, six hundred forty-one million, six hundred thirty-one thousand, one hundred forty-six".