19968625775 has 18 divisors (see below), whose sum is σ = 28803725640. Its totient is φ = 13692771120.

The previous prime is 19968625739. The next prime is 19968625777. The reversal of 19968625775 is 57752686991.

It is not a de Polignac number, because 19968625775 - 2⁶ = 19968625711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19968625777) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 8149235 + ... + 8151684.

It is an arithmetic number, because the mean of its divisors is an integer number (1600206980).

Almost surely, 2^19968625775 is an apocalyptic number.

19968625775 is a deficient number, since it is larger than the sum of its proper divisors (8835099865).

19968625775 is a wasteful number, since it uses less digits than its factorization.

19968625775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16300943 (or 16300931 counting only the distinct ones).

The product of its digits is 57153600, while the sum is 65.

The spelling of 19968625775 in words is "nineteen billion, nine hundred sixty-eight million, six hundred twenty-five thousand, seven hundred seventy-five".