9926644823 has 4 divisors (see below), whose sum is σ = 10137850080. Its totient is φ = 9715439568.

The previous prime is 9926644817. The next prime is 9926644831. The reversal of 9926644823 is 3284466299.

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

It is a cyclic number.

It is not a de Polignac number, because 9926644823 - 2¹⁰ = 9926643799 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 (9826644823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105602558 + ... + 105602651.

It is an arithmetic number, because the mean of its divisors is an integer number (2534462520).

Almost surely, 2^9926644823 is an apocalyptic number.

9926644823 is a deficient number, since it is larger than the sum of its proper divisors (211205257).

9926644823 is a wasteful number, since it uses less digits than its factorization.

9926644823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211205256.

The product of its digits is 4478976, while the sum is 53.

The square root of 9926644823 is about 99632.5490138639. The cubic root of 9926644823 is about 2149.1537915964.

The spelling of 9926644823 in words is "nine billion, nine hundred twenty-six million, six hundred forty-four thousand, eight hundred twenty-three".