1098281849785 has 4 divisors (see below), whose sum is σ = 1317938219748. Its totient is φ = 878625479824.

The previous prime is 1098281849741. The next prime is 1098281849801. The reversal of 1098281849785 is 5879481828901.

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 433515579561 + 664766270224 = 658419^2 + 815332^2 .

It is a cyclic number.

It is not a de Polignac number, because 1098281849785 - 2⁷ = 1098281849657 is a prime.

It is a super-2 number, since 2×1098281849785² (a number of 25 digits) contains 22 as substring.

It is a Duffinian 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, 109828184974 + ... + 109828184983.

It is an arithmetic number, because the mean of its divisors is an integer number (329484554937).

Almost surely, 2^{1098281849785} is an apocalyptic number.

It is an amenable number.

1098281849785 is a deficient number, since it is larger than the sum of its proper divisors (219656369963).

1098281849785 is an equidigital number, since it uses as much as digits as its factorization.

1098281849785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219656369962.

The product of its (nonzero) digits is 92897280, while the sum is 70.

The spelling of 1098281849785 in words is "one trillion, ninety-eight billion, two hundred eighty-one million, eight hundred forty-nine thousand, seven hundred eighty-five".