18158802463 has 4 divisors (see below), whose sum is σ = 18159585808. Its totient is φ = 18158019120.

The previous prime is 18158802449. The next prime is 18158802481. The reversal of 18158802463 is 36420885181.

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 18158802463 - 2¹³ = 18158794271 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 (18158802413) 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, 355806 + ... + 403627.

It is an arithmetic number, because the mean of its divisors is an integer number (4539896452).

Almost surely, 2^18158802463 is an apocalyptic number.

18158802463 is a deficient number, since it is larger than the sum of its proper divisors (783345).

18158802463 is an equidigital number, since it uses as much as digits as its factorization.

18158802463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783344.

The product of its (nonzero) digits is 368640, while the sum is 46.

The spelling of 18158802463 in words is "eighteen billion, one hundred fifty-eight million, eight hundred two thousand, four hundred sixty-three".