1898465536225 has 12 divisors (see below), whose sum is σ = 2354114395116. Its totient is φ = 1518761377280.

The previous prime is 1898465536223. The next prime is 1898465536243. The reversal of 1898465536225 is 5226355648981.

It can be written as a sum of positive squares in 6 ways, for example, as 183109535569 + 1715356000656 = 427913^2 + 1309716^2 .

It is not a de Polignac number, because 1898465536225 - 2¹ = 1898465536223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1898465536223) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 6259689 + ... + 6555961.

It is an arithmetic number, because the mean of its divisors is an integer number (196176199593).

Almost surely, 2^{1898465536225} is an apocalyptic number.

It is an amenable number.

1898465536225 is a deficient number, since it is larger than the sum of its proper divisors (455648858891).

1898465536225 is a wasteful number, since it uses less digits than its factorization.

1898465536225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552596 (or 552591 counting only the distinct ones).

The product of its digits is 124416000, while the sum is 64.

The spelling of 1898465536225 in words is "one trillion, eight hundred ninety-eight billion, four hundred sixty-five million, five hundred thirty-six thousand, two hundred twenty-five".