1898275863809 has 12 divisors (see below), whose sum is σ = 2056856773500. Its totient is φ = 1751123185344.

The previous prime is 1898275863767. The next prime is 1898275863821. The reversal of 1898275863809 is 9083685728981.

It can be written as a sum of positive squares in 6 ways, for example, as 51666653809 + 1846609210000 = 227303^2 + 1358900^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1898275863809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1898275863839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3363914 + ... + 3887475.

It is an arithmetic number, because the mean of its divisors is an integer number (171404731125).

Almost surely, 2^{1898275863809} is an apocalyptic number.

It is an amenable number.

1898275863809 is a deficient number, since it is larger than the sum of its proper divisors (158580909691).

1898275863809 is a wasteful number, since it uses less digits than its factorization.

1898275863809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7252964 (or 7252951 counting only the distinct ones).

The product of its (nonzero) digits is 418037760, while the sum is 74.

The spelling of 1898275863809 in words is "one trillion, eight hundred ninety-eight billion, two hundred seventy-five million, eight hundred sixty-three thousand, eight hundred nine".