19612716805 has 16 divisors (see below), whose sum is σ = 25688672064. Its totient is φ = 14256103680.

The previous prime is 19612716779. The next prime is 19612716853. The reversal of 19612716805 is 50861721691.

It is not a de Polignac number, because 19612716805 - 2²³ = 19604328197 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7822 + ... + 198208.

It is an arithmetic number, because the mean of its divisors is an integer number (1605542004).

Almost surely, 2^19612716805 is an apocalyptic number.

It is an amenable number.

19612716805 is a deficient number, since it is larger than the sum of its proper divisors (6075955259).

19612716805 is a wasteful number, since it uses less digits than its factorization.

19612716805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192276.

The product of its (nonzero) digits is 181440, while the sum is 46.

The spelling of 19612716805 in words is "nineteen billion, six hundred twelve million, seven hundred sixteen thousand, eight hundred five".