1800165474 has 48 divisors (see below), whose sum is σ = 4042531584. Its totient is φ = 578340000.

The previous prime is 1800165463. The next prime is 1800165481. The reversal of 1800165474 is 4745610081.

It is a happy number.

1800165474 is a `hidden beast` number, since 180 + 0 + 1 + 6 + 5 + 474 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 133632 + ... + 146484.

It is an arithmetic number, because the mean of its divisors is an integer number (84219408).

Almost surely, 2^1800165474 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1800165474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2021265792).

1800165474 is an abundant number, since it is smaller than the sum of its proper divisors (2242366110).

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

1800165474 is a wasteful number, since it uses less digits than its factorization.

1800165474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13143 (or 13140 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 1800165474 is about 42428.3569561679. The cubic root of 1800165474 is about 1216.4776737611.

The spelling of 1800165474 in words is "one billion, eight hundred million, one hundred sixty-five thousand, four hundred seventy-four".