19051661168 has 20 divisors (see below), whose sum is σ = 37194373128. Its totient is φ = 9453113280.

The previous prime is 19051661143. The next prime is 19051661197. The reversal of 19051661168 is 86116615091.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4542671 + ... + 4546862.

Almost surely, 2^19051661168 is an apocalyptic number.

It is an amenable number.

19051661168 is a deficient number, since it is larger than the sum of its proper divisors (18142711960).

19051661168 is a wasteful number, since it uses less digits than its factorization.

19051661168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9089672 (or 9089666 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 44.

The spelling of 19051661168 in words is "nineteen billion, fifty-one million, six hundred sixty-one thousand, one hundred sixty-eight".