1810868119225 has 81 divisors (see below), whose sum is σ = 2531351237709. Its totient is φ = 1284106454400.

The previous prime is 1810868119199. The next prime is 1810868119369. The reversal of 1810868119225 is 5229118680181.

The square root of 1810868119225 is 1345685.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 430402914601 + 1380465204624 = 656051^2 + 1174932^2 .

It is not a de Polignac number, because 1810868119225 - 2¹⁵ = 1810868086457 is a prime.

It is a Duffinian 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 80 ways as a sum of consecutive naturals, for example, 3182544741 + ... + 3182545309.

Almost surely, 2^{1810868119225} is an apocalyptic number.

1810868119225 is the 1345685-th square number.

1810868119225 is the 672843-rd centered octagonal number.

It is an amenable number.

1810868119225 is a deficient number, since it is larger than the sum of its proper divisors (720483118484).

1810868119225 is an frugal number, since it uses more digits than its factorization.

1810868119225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 52.

The spelling of 1810868119225 in words is "one trillion, eight hundred ten billion, eight hundred sixty-eight million, one hundred nineteen thousand, two hundred twenty-five".