2161606942 has 16 divisors (see below), whose sum is σ = 3585632112. Its totient is φ = 969088320.

The previous prime is 2161606913. The next prime is 2161606957. The reversal of 2161606942 is 2496061612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 671373 + ... + 674584.

It is an arithmetic number, because the mean of its divisors is an integer number (224102007).

Almost surely, 2^2161606942 is an apocalyptic number.

2161606942 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2161606942 is a deficient number, since it is larger than the sum of its proper divisors (1424025170).

2161606942 is a wasteful number, since it uses less digits than its factorization.

2161606942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346043.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 2161606942 is about 46493.0848836685. The cubic root of 2161606942 is about 1292.9812948902.

The spelling of 2161606942 in words is "two billion, one hundred sixty-one million, six hundred six thousand, nine hundred forty-two".