1998674925025 has 27 divisors (see below), whose sum is σ = 2487903764619. Its totient is φ = 1592804286720.

The previous prime is 1998674925001. The next prime is 1998674925031. The reversal of 1998674925025 is 5205294768991.

The square root of 1998674925025 is 1413745.

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

It can be written as a sum of positive squares in 13 ways, for example, as 1985120377249 + 13554547776 = 1408943^2 + 116424^2 .

It is not a de Polignac number, because 1998674925025 - 2¹⁷ = 1998674793953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3060757599 + ... + 3060758251.

Almost surely, 2^{1998674925025} is an apocalyptic number.

1998674925025 is the 1413745-th square number.

1998674925025 is the 706873-rd centered octagonal number.

It is an amenable number.

1998674925025 is a deficient number, since it is larger than the sum of its proper divisors (489228839594).

1998674925025 is an frugal number, since it uses more digits than its factorization.

1998674925025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182 (or 1091 counting only the distinct ones).

The product of its (nonzero) digits is 97977600, while the sum is 67.

The spelling of 1998674925025 in words is "one trillion, nine hundred ninety-eight billion, six hundred seventy-four million, nine hundred twenty-five thousand, twenty-five".