9925646805 has 24 divisors (see below), whose sum is σ = 17759439360. Its totient is φ = 5122913760.

The previous prime is 9925646791. The next prime is 9925646851. The reversal of 9925646805 is 5086465299.

It is a happy number.

It is not a de Polignac number, because 9925646805 - 2⁴ = 9925646789 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3556185 + ... + 3558974.

It is an arithmetic number, because the mean of its divisors is an integer number (739976640).

Almost surely, 2^9925646805 is an apocalyptic number.

It is an amenable number.

9925646805 is a deficient number, since it is larger than the sum of its proper divisors (7833792555).

9925646805 is a wasteful number, since it uses less digits than its factorization.

9925646805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7115201 (or 7115198 counting only the distinct ones).

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

The square root of 9925646805 is about 99627.5403942103. The cubic root of 9925646805 is about 2149.0817643709.

The spelling of 9925646805 in words is "nine billion, nine hundred twenty-five million, six hundred forty-six thousand, eight hundred five".