18461591838963 has 36 divisors (see below), whose sum is σ = 33406690004688. Its totient is φ = 9737982505440.

The previous prime is 18461591838961. The next prime is 18461591838979. The reversal of 18461591838963 is 36983819516481.

18461591838963 is a `hidden beast` number, since 1 + 8 + 461 + 5 + 9 + 1 + 83 + 89 + 6 + 3 = 666.

It is not a de Polignac number, because 18461591838963 - 2¹ = 18461591838961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18461591838891 and 18461591838900.

It is not an unprimeable number, because it can be changed into a prime (18461591838961) 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 35 ways as a sum of consecutive naturals, for example, 1610110423 + ... + 1610121888.

Almost surely, 2^{18461591838963} is an apocalyptic number.

18461591838963 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18461591838963 is a deficient number, since it is larger than the sum of its proper divisors (14945098165725).

18461591838963 is a wasteful number, since it uses less digits than its factorization.

18461591838963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220232344 (or 3220232334 counting only the distinct ones).

The product of its digits is 268738560, while the sum is 72.

The spelling of 18461591838963 in words is "eighteen trillion, four hundred sixty-one billion, five hundred ninety-one million, eight hundred thirty-eight thousand, nine hundred sixty-three".