9640911939 has 16 divisors (see below), whose sum is σ = 13616755200. Its totient is φ = 6046508160.

The previous prime is 9640911911. The next prime is 9640911941. The reversal of 9640911939 is 9391190469.

It is not a de Polignac number, because 9640911939 - 2⁷ = 9640911811 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 9640911891 and 9640911900.

It is not an unprimeable number, because it can be changed into a prime (9640911979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76962 + ... + 158760.

It is an arithmetic number, because the mean of its divisors is an integer number (851047200).

Almost surely, 2^9640911939 is an apocalyptic number.

9640911939 is a deficient number, since it is larger than the sum of its proper divisors (3975843261).

9640911939 is a wasteful number, since it uses less digits than its factorization.

9640911939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84130.

The product of its (nonzero) digits is 472392, while the sum is 51.

The square root of 9640911939 is about 98188.1456134090. The cubic root of 9640911939 is about 2128.3319862267.

The spelling of 9640911939 in words is "nine billion, six hundred forty million, nine hundred eleven thousand, nine hundred thirty-nine".