19100000161 has 6 divisors (see below), whose sum is σ = 20994215186. Its totient is φ = 17363636400.

The previous prime is 19100000141. The next prime is 19100000189. The reversal of 19100000161 is 16100000191.

It can be written as a sum of positive squares in only one way, i.e., 16836619536 + 2263380625 = 129756^2 + 47575^2 .

It is not a de Polignac number, because 19100000161 - 2²¹ = 19097903009 is a prime.

19100000161 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19100000111) 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 5 ways as a sum of consecutive naturals, for example, 78925500 + ... + 78925741.

Almost surely, 2^19100000161 is an apocalyptic number.

19100000161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

19100000161 is a deficient number, since it is larger than the sum of its proper divisors (1894215025).

19100000161 is a wasteful number, since it uses less digits than its factorization.

19100000161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157851263 (or 157851252 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 19.

The spelling of 19100000161 in words is "nineteen billion, one hundred million, one hundred sixty-one", and thus it is an aban number.