9640954691 has 4 divisors (see below), whose sum is σ = 9901521072. Its totient is φ = 9380388312.

The previous prime is 9640954667. The next prime is 9640954699. The reversal of 9640954691 is 1964590469.

9640954691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1964590469 = 42689 ⋅46021.

It is a cyclic number.

It is not a de Polignac number, because 9640954691 - 2²² = 9636760387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9640954699) 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 3 ways as a sum of consecutive naturals, for example, 130283135 + ... + 130283208.

It is an arithmetic number, because the mean of its divisors is an integer number (2475380268).

Almost surely, 2^9640954691 is an apocalyptic number.

9640954691 is a deficient number, since it is larger than the sum of its proper divisors (260566381).

9640954691 is a wasteful number, since it uses less digits than its factorization.

9640954691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260566380.

The product of its (nonzero) digits is 2099520, while the sum is 53.

The square root of 9640954691 is about 98188.3633176559. The cubic root of 9640954691 is about 2128.3351322055.

The spelling of 9640954691 in words is "nine billion, six hundred forty million, nine hundred fifty-four thousand, six hundred ninety-one".