1804518145 has 8 divisors (see below), whose sum is σ = 2172814056. Its totient is φ = 1438686336.

The previous prime is 1804518139. The next prime is 1804518161. The reversal of 1804518145 is 5418154081.

It can be written as a sum of positive squares in 4 ways, for example, as 831514896 + 973003249 = 28836^2 + 31193^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1804518145 - 2⁷ = 1804518017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 614412 + ... + 617341.

It is an arithmetic number, because the mean of its divisors is an integer number (271601757).

Almost surely, 2^1804518145 is an apocalyptic number.

It is an amenable number.

1804518145 is a deficient number, since it is larger than the sum of its proper divisors (368295911).

1804518145 is a wasteful number, since it uses less digits than its factorization.

1804518145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1232051.

The product of its (nonzero) digits is 25600, while the sum is 37.

The square root of 1804518145 is about 42479.6203490568. The cubic root of 1804518145 is about 1217.4573365214.

The spelling of 1804518145 in words is "one billion, eight hundred four million, five hundred eighteen thousand, one hundred forty-five".