19543125668 has 24 divisors (see below), whose sum is σ = 38931762240. Its totient is φ = 8497010720.

The previous prime is 19543125653. The next prime is 19543125689. The reversal of 19543125668 is 86652134591.

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 7 ways as a sum of consecutive naturals, for example, 9654683 + ... + 9656706.

It is an arithmetic number, because the mean of its divisors is an integer number (1622156760).

Almost surely, 2^19543125668 is an apocalyptic number.

It is an amenable number.

19543125668 is a deficient number, since it is larger than the sum of its proper divisors (19388636572).

19543125668 is a wasteful number, since it uses less digits than its factorization.

19543125668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19311427 (or 19311425 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 50.

The spelling of 19543125668 in words is "nineteen billion, five hundred forty-three million, one hundred twenty-five thousand, six hundred sixty-eight".