9809361788825 has 12 divisors (see below), whose sum is σ = 12330233396028. Its totient is φ = 7739989574400.

The previous prime is 9809361788797. The next prime is 9809361788839. The reversal of 9809361788825 is 5288871639089.

It can be written as a sum of positive squares in 6 ways, for example, as 96191161609 + 9713170627216 = 310147^2 + 3116596^2 .

It is not a de Polignac number, because 9809361788825 - 2⁶ = 9809361788761 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2687494556 + ... + 2687498205.

It is an arithmetic number, because the mean of its divisors is an integer number (1027519449669).

Almost surely, 2^{9809361788825} is an apocalyptic number.

It is an amenable number.

9809361788825 is a deficient number, since it is larger than the sum of its proper divisors (2520871607203).

9809361788825 is a wasteful number, since it uses less digits than its factorization.

9809361788825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5374992844 (or 5374992839 counting only the distinct ones).

The product of its (nonzero) digits is 418037760, while the sum is 74.

The spelling of 9809361788825 in words is "nine trillion, eight hundred nine billion, three hundred sixty-one million, seven hundred eighty-eight thousand, eight hundred twenty-five".