998450600625 has 75 divisors (see below), whose sum is σ = 1864213950423. Its totient is φ = 532387080000.

The previous prime is 998450600527. The next prime is 998450600629. The reversal of 998450600625 is 526006054899.

It is a happy number.

The square root of 998450600625 is 999225.

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

998450600625 is a `hidden beast` number, since 9 + 9 + 8 + 4 + 5 + 0 + 6 + 0 + 0 + 625 = 666.

It can be written as a sum of positive squares in 7 ways, for example, as 856544697009 + 141905903616 = 925497^2 + 376704^2 .

It is a tau number, because it is divible by the number of its divisors (75).

It is not a de Polignac number, because 998450600625 - 2³³ = 989860666033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (998450600629) 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 74 ways as a sum of consecutive naturals, for example, 224823405 + ... + 224827845.

Almost surely, 2^998450600625 is an apocalyptic number.

998450600625 is the 999225-th square number.

998450600625 is the 499613-rd centered octagonal number.

It is an amenable number.

998450600625 is a deficient number, since it is larger than the sum of its proper divisors (865763349798).

998450600625 is an frugal number, since it uses more digits than its factorization.

998450600625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8914 (or 4449 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 998450600625 in words is "nine hundred ninety-eight billion, four hundred fifty million, six hundred thousand, six hundred twenty-five".