9925944687 has 24 divisors (see below), whose sum is σ = 14977072656. Its totient is φ = 6568972992.

The previous prime is 9925944661. The next prime is 9925944701. The reversal of 9925944687 is 7864495299.

9925944687 is a `hidden beast` number, since 99 + 25 + 9 + 446 + 87 = 666.

It is not a de Polignac number, because 9925944687 - 2³¹ = 7778461039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9925444687) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115788 + ... + 182369.

It is an arithmetic number, because the mean of its divisors is an integer number (624044694).

Almost surely, 2^9925944687 is an apocalyptic number.

9925944687 is a deficient number, since it is larger than the sum of its proper divisors (5051127969).

9925944687 is a wasteful number, since it uses less digits than its factorization.

9925944687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298309 (or 298297 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 63.

The square root of 9925944687 is about 99629.0353611837. The cubic root of 9925944687 is about 2149.1032630998.

The spelling of 9925944687 in words is "nine billion, nine hundred twenty-five million, nine hundred forty-four thousand, six hundred eighty-seven".