2161606146 has 32 divisors (see below), whose sum is σ = 4952266368. Its totient is φ = 616170240.

The previous prime is 2161606129. The next prime is 2161606201. The reversal of 2161606146 is 6416061612.

It is a happy number.

It is a super-2 number, since 2×2161606146² = 9345082260849946632, which contains 22 as substring.

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, 41245 + ... + 77616.

It is an arithmetic number, because the mean of its divisors is an integer number (154758324).

Almost surely, 2^2161606146 is an apocalyptic number.

2161606146 is an abundant number, since it is smaller than the sum of its proper divisors (2790660222).

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

2161606146 is a wasteful number, since it uses less digits than its factorization.

2161606146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119306.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 2161606146 is about 46493.0763232548. The cubic root of 2161606146 is about 1292.9811361791.

Adding to 2161606146 its reverse (6416061612), we get a palindrome (8577667758).

The spelling of 2161606146 in words is "two billion, one hundred sixty-one million, six hundred six thousand, one hundred forty-six".