1804428130165 has 4 divisors (see below), whose sum is σ = 2165313756204. Its totient is φ = 1443542504128.

The previous prime is 1804428130139. The next prime is 1804428130171. The reversal of 1804428130165 is 5610318244081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 444652913329 + 1359775216836 = 666823^2 + 1166094^2 .

It is a cyclic number.

It is not a de Polignac number, because 1804428130165 - 2²⁵ = 1804394575733 is a prime.

It is a Duffinian number.

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, 180442813012 + ... + 180442813021.

It is an arithmetic number, because the mean of its divisors is an integer number (541328439051).

Almost surely, 2^{1804428130165} is an apocalyptic number.

It is an amenable number.

1804428130165 is a deficient number, since it is larger than the sum of its proper divisors (360885626039).

1804428130165 is an equidigital number, since it uses as much as digits as its factorization.

1804428130165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360885626038.

The product of its (nonzero) digits is 184320, while the sum is 43.

The spelling of 1804428130165 in words is "one trillion, eight hundred four billion, four hundred twenty-eight million, one hundred thirty thousand, one hundred sixty-five".