9639665290 has 16 divisors (see below), whose sum is σ = 17476230240. Its totient is φ = 3828125520.

The previous prime is 9639665237. The next prime is 9639665297. The reversal of 9639665290 is 925669369.

9639665290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (9639665297) 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 7 ways as a sum of consecutive naturals, for example, 3466116 + ... + 3468895.

It is an arithmetic number, because the mean of its divisors is an integer number (1092264390).

Almost surely, 2^9639665290 is an apocalyptic number.

9639665290 is a deficient number, since it is larger than the sum of its proper divisors (7836564950).

9639665290 is a wasteful number, since it uses less digits than its factorization.

9639665290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6935157.

The product of its (nonzero) digits is 4723920, while the sum is 55.

The square root of 9639665290 is about 98181.7971418328. The cubic root of 9639665290 is about 2128.2402453440.

The spelling of 9639665290 in words is "nine billion, six hundred thirty-nine million, six hundred sixty-five thousand, two hundred ninety".