1816194906 has 32 divisors (see below), whose sum is σ = 4058308800. Its totient is φ = 602050320.

The previous prime is 1816194899. The next prime is 1816195013. The reversal of 1816194906 is 6094916181.

1816194906 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83136 + ... + 102683.

It is an arithmetic number, because the mean of its divisors is an integer number (126822150).

Almost surely, 2^1816194906 is an apocalyptic number.

1816194906 is an abundant number, since it is smaller than the sum of its proper divisors (2242113894).

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

1816194906 is a wasteful number, since it uses less digits than its factorization.

1816194906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186011 (or 186005 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 1816194906 is about 42616.8382919240. The cubic root of 1816194906 is about 1220.0776860859.

The spelling of 1816194906 in words is "one billion, eight hundred sixteen million, one hundred ninety-four thousand, nine hundred six".