2161891428182 has 16 divisors (see below), whose sum is σ = 3413713509360. Its totient is φ = 1023993616032.

The previous prime is 2161891428173. The next prime is 2161891428227. The reversal of 2161891428182 is 2818241981612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1014653 + ... + 2313720.

It is an arithmetic number, because the mean of its divisors is an integer number (213357094335).

Almost surely, 2^{2161891428182} is an apocalyptic number.

2161891428182 is a deficient number, since it is larger than the sum of its proper divisors (1251822081178).

2161891428182 is a wasteful number, since it uses less digits than its factorization.

2161891428182 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3345487.

The product of its digits is 884736, while the sum is 53.

The spelling of 2161891428182 in words is "two trillion, one hundred sixty-one billion, eight hundred ninety-one million, four hundred twenty-eight thousand, one hundred eighty-two".