18461558807 has 2 divisors, whose sum is σ = 18461558808. Its totient is φ = 18461558806.

The previous prime is 18461558767. The next prime is 18461558809. The reversal of 18461558807 is 70885516481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18461558807 - 2¹⁴ = 18461542423 is a prime.

Together with 18461558809, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18461558809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9230779403 + 9230779404.

It is an arithmetic number, because the mean of its divisors is an integer number (9230779404).

Almost surely, 2^18461558807 is an apocalyptic number.

18461558807 is a deficient number, since it is larger than the sum of its proper divisors (1).

18461558807 is an equidigital number, since it uses as much as digits as its factorization.

18461558807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2150400, while the sum is 53.

The spelling of 18461558807 in words is "eighteen billion, four hundred sixty-one million, five hundred fifty-eight thousand, eight hundred seven".