16642519667 has 4 divisors (see below), whose sum is σ = 16829514360. Its totient is φ = 16455524976.

The previous prime is 16642519637. The next prime is 16642519679. The reversal of 16642519667 is 76691524661.

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

It is a cyclic number.

It is not a de Polignac number, because 16642519667 - 2¹⁰ = 16642518643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16642519637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93497213 + ... + 93497390.

It is an arithmetic number, because the mean of its divisors is an integer number (4207378590).

Almost surely, 2^16642519667 is an apocalyptic number.

16642519667 is a deficient number, since it is larger than the sum of its proper divisors (186994693).

16642519667 is an equidigital number, since it uses as much as digits as its factorization.

16642519667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186994692.

The product of its digits is 3265920, while the sum is 53.

The spelling of 16642519667 in words is "sixteen billion, six hundred forty-two million, five hundred nineteen thousand, six hundred sixty-seven".