1816056172 has 48 divisors (see below), whose sum is σ = 3846689280. Its totient is φ = 733341312.

The previous prime is 1816056107. The next prime is 1816056181. The reversal of 1816056172 is 2716506181.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22104 + ... + 64192.

It is an arithmetic number, because the mean of its divisors is an integer number (80139360).

Almost surely, 2^1816056172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1816056172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1923344640).

1816056172 is an abundant number, since it is smaller than the sum of its proper divisors (2030633108).

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

1816056172 is a wasteful number, since it uses less digits than its factorization.

1816056172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42190 (or 42188 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 1816056172 is about 42615.2105708748. The cubic root of 1816056172 is about 1220.0466191986.

The spelling of 1816056172 in words is "one billion, eight hundred sixteen million, fifty-six thousand, one hundred seventy-two".