1998247454725 has 48 divisors (see below), whose sum is σ = 2637991153296. Its totient is φ = 1496317952000.

The previous prime is 1998247454701. The next prime is 1998247454761. The reversal of 1998247454725 is 5274547428991.

It can be written as a sum of positive squares in 24 ways, for example, as 234660798724 + 1763586656001 = 484418^2 + 1328001^2 .

It is not a de Polignac number, because 1998247454725 - 2⁹ = 1998247454213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 69998955 + ... + 70027495.

It is an arithmetic number, because the mean of its divisors is an integer number (54958149027).

Almost surely, 2^{1998247454725} is an apocalyptic number.

It is an amenable number.

1998247454725 is a deficient number, since it is larger than the sum of its proper divisors (639743698571).

1998247454725 is a wasteful number, since it uses less digits than its factorization.

1998247454725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29466 (or 29461 counting only the distinct ones).

The product of its digits is 203212800, while the sum is 67.

The spelling of 1998247454725 in words is "one trillion, nine hundred ninety-eight billion, two hundred forty-seven million, four hundred fifty-four thousand, seven hundred twenty-five".