19685878295811 has 16 divisors (see below), whose sum is σ = 32305031049984. Its totient is φ = 10383759980064.

The previous prime is 19685878295801. The next prime is 19685878295843. The reversal of 19685878295811 is 11859287858691.

It is not a de Polignac number, because 19685878295811 - 2⁵ = 19685878295779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19685878295801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36054721881 + ... + 36054722426.

It is an arithmetic number, because the mean of its divisors is an integer number (2019064440624).

Almost surely, 2^{19685878295811} is an apocalyptic number.

19685878295811 is a deficient number, since it is larger than the sum of its proper divisors (12619152754173).

19685878295811 is a wasteful number, since it uses less digits than its factorization.

19685878295811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72109444330.

The product of its digits is 696729600, while the sum is 78.

The spelling of 19685878295811 in words is "nineteen trillion, six hundred eighty-five billion, eight hundred seventy-eight million, two hundred ninety-five thousand, eight hundred eleven".