2161291289522 has 16 divisors (see below), whose sum is σ = 3266345930400. Its totient is φ = 1072514483040.

The previous prime is 2161291289513. The next prime is 2161291289561. The reversal of 2161291289522 is 2259821921612.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 453947 + ... + 2128062.

It is an arithmetic number, because the mean of its divisors is an integer number (204146620650).

Almost surely, 2^{2161291289522} is an apocalyptic number.

2161291289522 is a deficient number, since it is larger than the sum of its proper divisors (1105054640878).

2161291289522 is a wasteful number, since it uses less digits than its factorization.

2161291289522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2585161.

The product of its digits is 622080, while the sum is 50.

The spelling of 2161291289522 in words is "two trillion, one hundred sixty-one billion, two hundred ninety-one million, two hundred eighty-nine thousand, five hundred twenty-two".