16519983819 has 8 divisors (see below), whose sum is σ = 22031833920. Its totient is φ = 11010728136.

The previous prime is 16519983817. The next prime is 16519983829. The reversal of 16519983819 is 91838991561.

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

It is not a de Polignac number, because 16519983819 - 2¹ = 16519983817 is a prime.

It is a super-2 number, since 2×16519983819² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16519983817) 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, 633697 + ... + 659250.

It is an arithmetic number, because the mean of its divisors is an integer number (2753979240).

Almost surely, 2^16519983819 is an apocalyptic number.

16519983819 is a deficient number, since it is larger than the sum of its proper divisors (5511850101).

16519983819 is a wasteful number, since it uses less digits than its factorization.

16519983819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297209.

The product of its digits is 4199040, while the sum is 60.

The spelling of 16519983819 in words is "sixteen billion, five hundred nineteen million, nine hundred eighty-three thousand, eight hundred nineteen".