19161419509 has 8 divisors (see below), whose sum is σ = 19424979360. Its totient is φ = 18899424336.

The previous prime is 19161419507. The next prime is 19161419539. The reversal of 19161419509 is 90591416191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19161419509 - 2¹ = 19161419507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19161419503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366499 + ... + 415504.

It is an arithmetic number, because the mean of its divisors is an integer number (2428122420).

Almost surely, 2^19161419509 is an apocalyptic number.

It is an amenable number.

19161419509 is a deficient number, since it is larger than the sum of its proper divisors (263559851).

19161419509 is a wasteful number, since it uses less digits than its factorization.

19161419509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782339.

The product of its (nonzero) digits is 87480, while the sum is 46.

The spelling of 19161419509 in words is "nineteen billion, one hundred sixty-one million, four hundred nineteen thousand, five hundred nine".