16519266421 has 8 divisors (see below), whose sum is σ = 18992211840. Its totient is φ = 14074583568.

The previous prime is 16519266403. The next prime is 16519266431. The reversal of 16519266421 is 12466291561.

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 16519266421 - 2⁷ = 16519266293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16519266431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7064386 + ... + 7066723.

It is an arithmetic number, because the mean of its divisors is an integer number (2374026480).

Almost surely, 2^16519266421 is an apocalyptic number.

It is an amenable number.

16519266421 is a deficient number, since it is larger than the sum of its proper divisors (2472945419).

16519266421 is a wasteful number, since it uses less digits than its factorization.

16519266421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14131283.

The product of its digits is 155520, while the sum is 43.

The spelling of 16519266421 in words is "sixteen billion, five hundred nineteen million, two hundred sixty-six thousand, four hundred twenty-one".