161795979129 has 64 divisors (see below), whose sum is σ = 235089043200. Its totient is φ = 98601172992.

The previous prime is 161795979109. The next prime is 161795979139. The reversal of 161795979129 is 921979597161.

It is a happy number.

It is not a de Polignac number, because 161795979129 - 2¹³ = 161795970937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161795979129.

It is not an unprimeable number, because it can be changed into a prime (161795979109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 220730847 + ... + 220731579.

It is an arithmetic number, because the mean of its divisors is an integer number (3673266300).

Almost surely, 2^161795979129 is an apocalyptic number.

It is an amenable number.

161795979129 is a deficient number, since it is larger than the sum of its proper divisors (73293064071).

161795979129 is a wasteful number, since it uses less digits than its factorization.

161795979129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1594.

The product of its digits is 19289340, while the sum is 66.

The spelling of 161795979129 in words is "one hundred sixty-one billion, seven hundred ninety-five million, nine hundred seventy-nine thousand, one hundred twenty-nine".