1800494965 has 8 divisors (see below), whose sum is σ = 2161331928. Its totient is φ = 1439904000.

The previous prime is 1800494909. The next prime is 1800494981. The reversal of 1800494965 is 5694940081.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14333796 + 1786161169 = 3786^2 + 42263^2 .

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

It is not a de Polignac number, because 1800494965 - 2⁹ = 1800494453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44992 + ... + 75001.

It is an arithmetic number, because the mean of its divisors is an integer number (270166491).

Almost surely, 2^1800494965 is an apocalyptic number.

It is an amenable number.

1800494965 is a deficient number, since it is larger than the sum of its proper divisors (360836963).

1800494965 is a wasteful number, since it uses less digits than its factorization.

1800494965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122999.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 1800494965 is about 42432.2396887084. The cubic root of 1800494965 is about 1216.5518880485.

The spelling of 1800494965 in words is "one billion, eight hundred million, four hundred ninety-four thousand, nine hundred sixty-five".