19159972816 has 20 divisors (see below), whose sum is σ = 37172433312. Its totient is φ = 9567086816.

The previous prime is 19159972807. The next prime is 19159972817. The reversal of 19159972816 is 61827995191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19159972817) 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, 793966 + ... + 817741.

Almost surely, 2^19159972816 is an apocalyptic number.

19159972816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19159972816 is a deficient number, since it is larger than the sum of its proper divisors (18012460496).

19159972816 is a wasteful number, since it uses less digits than its factorization.

19159972816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612458 (or 1612452 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 58.

The spelling of 19159972816 in words is "nineteen billion, one hundred fifty-nine million, nine hundred seventy-two thousand, eight hundred sixteen".