19359408161 has 4 divisors (see below), whose sum is σ = 20378324400. Its totient is φ = 18340491924.

The previous prime is 19359408077. The next prime is 19359408169. The reversal of 19359408161 is 16180495391.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19359408161 - 2¹⁸ = 19359146017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19359408169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509458091 + ... + 509458128.

It is an arithmetic number, because the mean of its divisors is an integer number (5094581100).

Almost surely, 2^19359408161 is an apocalyptic number.

It is an amenable number.

19359408161 is a deficient number, since it is larger than the sum of its proper divisors (1018916239).

19359408161 is a wasteful number, since it uses less digits than its factorization.

19359408161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018916238.

The product of its (nonzero) digits is 233280, while the sum is 47.

The spelling of 19359408161 in words is "nineteen billion, three hundred fifty-nine million, four hundred eight thousand, one hundred sixty-one".