19765481163 has 4 divisors (see below), whose sum is σ = 26353974888. Its totient is φ = 13176987440.

The previous prime is 19765481149. The next prime is 19765481167. The reversal of 19765481163 is 36118456791.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19765481163 - 2⁴ = 19765481147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19765481167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3294246858 + ... + 3294246863.

It is an arithmetic number, because the mean of its divisors is an integer number (6588493722).

Almost surely, 2^19765481163 is an apocalyptic number.

19765481163 is a deficient number, since it is larger than the sum of its proper divisors (6588493725).

19765481163 is an equidigital number, since it uses as much as digits as its factorization.

19765481163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6588493724.

The product of its digits is 1088640, while the sum is 51.

The spelling of 19765481163 in words is "nineteen billion, seven hundred sixty-five million, four hundred eighty-one thousand, one hundred sixty-three".