16399319419 has 4 divisors (see below), whose sum is σ = 18742079344. Its totient is φ = 14056559496.

The previous prime is 16399319411. The next prime is 16399319459. The reversal of 16399319419 is 91491399361.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 16399319419 - 2³ = 16399319411 is a prime.

It is a super-2 number, since 2×16399319419² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16399319419.

It is not an unprimeable number, because it can be changed into a prime (16399319411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1171379952 + ... + 1171379965.

It is an arithmetic number, because the mean of its divisors is an integer number (4685519836).

Almost surely, 2^16399319419 is an apocalyptic number.

16399319419 is a deficient number, since it is larger than the sum of its proper divisors (2342759925).

16399319419 is an equidigital number, since it uses as much as digits as its factorization.

16399319419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2342759924.

The product of its digits is 1417176, while the sum is 55.

The spelling of 16399319419 in words is "sixteen billion, three hundred ninety-nine million, three hundred nineteen thousand, four hundred nineteen".