161968955 has 16 divisors (see below), whose sum is σ = 201719808. Its totient is φ = 124716000.

The previous prime is 161968927. The next prime is 161968981. The reversal of 161968955 is 559869161.

It is not a de Polignac number, because 161968955 - 2¹⁶ = 161903419 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26870 + ... + 32340.

It is an arithmetic number, because the mean of its divisors is an integer number (12607488).

Almost surely, 2^161968955 is an apocalyptic number.

161968955 is a deficient number, since it is larger than the sum of its proper divisors (39750853).

161968955 is a wasteful number, since it uses less digits than its factorization.

161968955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5698.

The product of its digits is 583200, while the sum is 50.

The square root of 161968955 is about 12726.7024401453. The cubic root of 161968955 is about 545.1013530887.

The spelling of 161968955 in words is "one hundred sixty-one million, nine hundred sixty-eight thousand, nine hundred fifty-five".