9944728361 has 4 divisors (see below), whose sum is σ = 9945598800. Its totient is φ = 9943857924.

The previous prime is 9944728351. The next prime is 9944728393. The reversal of 9944728361 is 1638274499.

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 a de Polignac number, because none of the positive numbers 2^k-9944728361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9944728301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 417851 + ... + 441008.

It is an arithmetic number, because the mean of its divisors is an integer number (2486399700).

Almost surely, 2^9944728361 is an apocalyptic number.

It is an amenable number.

9944728361 is a deficient number, since it is larger than the sum of its proper divisors (870439).

9944728361 is a wasteful number, since it uses less digits than its factorization.

9944728361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870438.

The product of its digits is 2612736, while the sum is 53.

The square root of 9944728361 is about 99723.2588767535. The cubic root of 9944728361 is about 2150.4580499463.

The spelling of 9944728361 in words is "nine billion, nine hundred forty-four million, seven hundred twenty-eight thousand, three hundred sixty-one".