1898181285025 has 9 divisors (see below), whose sum is σ = 2353753335481. Its totient is φ = 1518539517040.

The previous prime is 1898181284981. The next prime is 1898181285073. The reversal of 1898181285025 is 5205821818981.

The square root of 1898181285025 is 1377745.

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 185810137249 + 1712371147776 = 431057^2 + 1308576^2 .

It is not a de Polignac number, because 1898181285025 - 2⁹ = 1898181284513 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 (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6750951 + ... + 7026499.

Almost surely, 2^{1898181285025} is an apocalyptic number.

1898181285025 is the 1377745-th square number.

1898181285025 is the 688873-rd centered octagonal number.

It is an amenable number.

1898181285025 is a deficient number, since it is larger than the sum of its proper divisors (455572050456).

1898181285025 is an frugal number, since it uses more digits than its factorization.

1898181285025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551108 (or 275554 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 58.

The spelling of 1898181285025 in words is "one trillion, eight hundred ninety-eight billion, one hundred eighty-one million, two hundred eighty-five thousand, twenty-five".