19952163161 has 16 divisors (see below), whose sum is σ = 23471049600. Its totient is φ = 16602485760.

The previous prime is 19952163151. The next prime is 19952163173. The reversal of 19952163161 is 16136125991.

It is not a de Polignac number, because 19952163161 - 2¹⁸ = 19951901017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19952163151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30506 + ... + 202076.

It is an arithmetic number, because the mean of its divisors is an integer number (1466940600).

Almost surely, 2^19952163161 is an apocalyptic number.

It is an amenable number.

19952163161 is a deficient number, since it is larger than the sum of its proper divisors (3518886439).

19952163161 is a wasteful number, since it uses less digits than its factorization.

19952163161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172064.

The product of its digits is 87480, while the sum is 44.

The spelling of 19952163161 in words is "nineteen billion, nine hundred fifty-two million, one hundred sixty-three thousand, one hundred sixty-one".