1816263856 has 20 divisors (see below), whose sum is σ = 3838921704. Its totient is φ = 825574400.

The previous prime is 1816263853. The next prime is 1816263877. The reversal of 1816263856 is 6583626181.

It is a super-2 number, since 2×1816263856² = 6597628789223977472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1816263853) 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, 5159665 + ... + 5160016.

Almost surely, 2^1816263856 is an apocalyptic number.

1816263856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1816263856 is an abundant number, since it is smaller than the sum of its proper divisors (2022657848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1816263856 is a wasteful number, since it uses less digits than its factorization.

1816263856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10319700 (or 10319694 counting only the distinct ones).

The product of its digits is 414720, while the sum is 46.

The square root of 1816263856 is about 42617.6472367962. The cubic root of 1816263856 is about 1220.0931255617.

The spelling of 1816263856 in words is "one billion, eight hundred sixteen million, two hundred sixty-three thousand, eight hundred fifty-six".