1806198164 has 12 divisors (see below), whose sum is σ = 3161193588. Its totient is φ = 903000000.

The previous prime is 1806198161. The next prime is 1806198169. The reversal of 1806198164 is 4618916081.

It can be written as a sum of positive squares in 2 ways, for example, as 914578564 + 891619600 = 30242^2 + 29860^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1806198161) 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, 29414 + ... + 66914.

It is an arithmetic number, because the mean of its divisors is an integer number (263432799).

Almost surely, 2^1806198164 is an apocalyptic number.

It is an amenable number.

1806198164 is a deficient number, since it is larger than the sum of its proper divisors (1354995424).

1806198164 is a wasteful number, since it uses less digits than its factorization.

1806198164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49546 (or 49544 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 44.

The square root of 1806198164 is about 42499.3901603305. The cubic root of 1806198164 is about 1217.8350397594.

The spelling of 1806198164 in words is "one billion, eight hundred six million, one hundred ninety-eight thousand, one hundred sixty-four".