9618199825 has 36 divisors (see below), whose sum is σ = 12953160900. Its totient is φ = 7081451520.

The previous prime is 9618199819. The next prime is 9618199867. The reversal of 9618199825 is 5289918169.

9618199825 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 18 ways, for example, as 7316407296 + 2301792529 = 85536^2 + 47977^2 .

It is not a de Polignac number, because 9618199825 - 2²⁵ = 9584645393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9618199825.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1488201 + ... + 1494649.

It is an arithmetic number, because the mean of its divisors is an integer number (359810025).

Almost surely, 2^9618199825 is an apocalyptic number.

It is an amenable number.

9618199825 is a deficient number, since it is larger than the sum of its proper divisors (3334961075).

9618199825 is a wasteful number, since it uses less digits than its factorization.

9618199825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6838 (or 6820 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 58.

The square root of 9618199825 is about 98072.4213273028. The cubic root of 9618199825 is about 2126.6593599649.

The spelling of 9618199825 in words is "nine billion, six hundred eighteen million, one hundred ninety-nine thousand, eight hundred twenty-five".