9644265397 has 4 divisors (see below), whose sum is σ = 10386131980. Its totient is φ = 8902398816.

The previous prime is 9644265373. The next prime is 9644265403. The reversal of 9644265397 is 7935624469.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5450278276 + 4193987121 = 73826^2 + 64761^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9644265397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9644265307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370933272 + ... + 370933297.

It is an arithmetic number, because the mean of its divisors is an integer number (2596532995).

Almost surely, 2^9644265397 is an apocalyptic number.

It is an amenable number.

9644265397 is a deficient number, since it is larger than the sum of its proper divisors (741866583).

9644265397 is a wasteful number, since it uses less digits than its factorization.

9644265397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741866582.

The product of its digits is 9797760, while the sum is 55.

The square root of 9644265397 is about 98205.2208235387. The cubic root of 9644265397 is about 2128.5787279111.

The spelling of 9644265397 in words is "nine billion, six hundred forty-four million, two hundred sixty-five thousand, three hundred ninety-seven".