2161345213606 has 16 divisors (see below), whose sum is σ = 3255470619408. Its totient is φ = 1076189760000.

The previous prime is 2161345213543. The next prime is 2161345213607. The reversal of 2161345213606 is 6063125431612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161345213607) 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, 2721046 + ... + 3424438.

It is an arithmetic number, because the mean of its divisors is an integer number (203466913713).

Almost surely, 2^{2161345213606} is an apocalyptic number.

2161345213606 is a deficient number, since it is larger than the sum of its proper divisors (1094125405802).

2161345213606 is a wasteful number, since it uses less digits than its factorization.

2161345213606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709767.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 2161345213606 in words is "two trillion, one hundred sixty-one billion, three hundred forty-five million, two hundred thirteen thousand, six hundred six".