9923441561 has 4 divisors (see below), whose sum is σ = 10825572624. Its totient is φ = 9021310500.

The previous prime is 9923441557. The next prime is 9923441599. The reversal of 9923441561 is 1651443299.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9923441561 - 2² = 9923441557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9923441461) 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, 451065515 + ... + 451065536.

It is an arithmetic number, because the mean of its divisors is an integer number (2706393156).

Almost surely, 2^9923441561 is an apocalyptic number.

It is an amenable number.

9923441561 is a deficient number, since it is larger than the sum of its proper divisors (902131063).

9923441561 is a wasteful number, since it uses less digits than its factorization.

9923441561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902131062.

The product of its digits is 233280, while the sum is 44.

The square root of 9923441561 is about 99616.4723376611. The cubic root of 9923441561 is about 2148.9225942001.

The spelling of 9923441561 in words is "nine billion, nine hundred twenty-three million, four hundred forty-one thousand, five hundred sixty-one".