9640140979 has 24 divisors (see below), whose sum is σ = 11953766400. Its totient is φ = 7728935760.

The previous prime is 9640140977. The next prime is 9640141003. The reversal of 9640140979 is 9790410469.

9640140979 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 9640140979 - 2¹ = 9640140977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (9640140977) 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 23 ways as a sum of consecutive naturals, for example, 8014 + ... + 139084.

It is an arithmetic number, because the mean of its divisors is an integer number (498073600).

Almost surely, 2^9640140979 is an apocalyptic number.

9640140979 is a deficient number, since it is larger than the sum of its proper divisors (2313625421).

9640140979 is a wasteful number, since it uses less digits than its factorization.

9640140979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131183 (or 131176 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 9640140979 is about 98184.2196027447. The cubic root of 9640140979 is about 2128.2752522241.

The spelling of 9640140979 in words is "nine billion, six hundred forty million, one hundred forty thousand, nine hundred seventy-nine".