18778063863 has 16 divisors (see below), whose sum is σ = 26970247136. Its totient is φ = 11552785920.

The previous prime is 18778063861. The next prime is 18778063867. The reversal of 18778063863 is 36836087781.

It is not a de Polignac number, because 18778063863 - 2¹ = 18778063861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18778063861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98883 + ... + 217563.

It is an arithmetic number, because the mean of its divisors is an integer number (1685640446).

Almost surely, 2^18778063863 is an apocalyptic number.

18778063863 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18778063863 is a deficient number, since it is larger than the sum of its proper divisors (8192183273).

18778063863 is a wasteful number, since it uses less digits than its factorization.

18778063863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122754.

The product of its (nonzero) digits is 8128512, while the sum is 57.

The spelling of 18778063863 in words is "eighteen billion, seven hundred seventy-eight million, sixty-three thousand, eight hundred sixty-three".