19116361853 has 2 divisors, whose sum is σ = 19116361854. Its totient is φ = 19116361852.

The previous prime is 19116361801. The next prime is 19116361931. The reversal of 19116361853 is 35816361191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18948348409 + 168013444 = 137653^2 + 12962^2 .

It is a cyclic number.

It is not a de Polignac number, because 19116361853 - 2²⁰ = 19115313277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19116361753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9558180926 + 9558180927.

It is an arithmetic number, because the mean of its divisors is an integer number (9558180927).

Almost surely, 2^19116361853 is an apocalyptic number.

It is an amenable number.

19116361853 is a deficient number, since it is larger than the sum of its proper divisors (1).

19116361853 is an equidigital number, since it uses as much as digits as its factorization.

19116361853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 44.

The spelling of 19116361853 in words is "nineteen billion, one hundred sixteen million, three hundred sixty-one thousand, eight hundred fifty-three".