1816238516 has 12 divisors (see below), whose sum is σ = 3316609632. Its totient is φ = 868635768.

The previous prime is 1816238507. The next prime is 1816238569. The reversal of 1816238516 is 6158326181.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9870770 + ... + 9870953.

It is an arithmetic number, because the mean of its divisors is an integer number (276384136).

Almost surely, 2^1816238516 is an apocalyptic number.

It is an amenable number.

1816238516 is a deficient number, since it is larger than the sum of its proper divisors (1500371116).

1816238516 is a wasteful number, since it uses less digits than its factorization.

1816238516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19741750 (or 19741748 counting only the distinct ones).

The product of its digits is 69120, while the sum is 41.

The square root of 1816238516 is about 42617.3499410745. The cubic root of 1816238516 is about 1220.0874514039.

The spelling of 1816238516 in words is "one billion, eight hundred sixteen million, two hundred thirty-eight thousand, five hundred sixteen".