9640911951 has 32 divisors (see below), whose sum is σ = 15794749440. Its totient is φ = 5762923200.

The previous prime is 9640911941. The next prime is 9640911953. The reversal of 9640911951 is 1591190469.

9640911951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9640911951 - 2⁹ = 9640911439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9640911897 and 9640911906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9640911953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 200655 + ... + 244016.

It is an arithmetic number, because the mean of its divisors is an integer number (493585920).

Almost surely, 2^9640911951 is an apocalyptic number.

9640911951 is a deficient number, since it is larger than the sum of its proper divisors (6153837489).

9640911951 is a wasteful number, since it uses less digits than its factorization.

9640911951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444764 (or 444758 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 45.

The square root of 9640911951 is about 98188.1456745161. The cubic root of 9640911951 is about 2128.3319871098.

The spelling of 9640911951 in words is "nine billion, six hundred forty million, nine hundred eleven thousand, nine hundred fifty-one".