9945944601 has 16 divisors (see below), whose sum is σ = 13309795008. Its totient is φ = 6606388800.

The previous prime is 9945944563. The next prime is 9945944627. The reversal of 9945944601 is 1064495499.

It is not a de Polignac number, because 9945944601 - 2¹⁷ = 9945813529 is a prime.

It is a super-2 number, since 2×9945944601² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9945944101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2775631 + ... + 2779211.

It is an arithmetic number, because the mean of its divisors is an integer number (831862188).

Almost surely, 2^9945944601 is an apocalyptic number.

It is an amenable number.

9945944601 is a deficient number, since it is larger than the sum of its proper divisors (3363850407).

9945944601 is a wasteful number, since it uses less digits than its factorization.

9945944601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6712.

The product of its (nonzero) digits is 1399680, while the sum is 51.

The square root of 9945944601 is about 99729.3567662000. The cubic root of 9945944601 is about 2150.5457133591.

The spelling of 9945944601 in words is "nine billion, nine hundred forty-five million, nine hundred forty-four thousand, six hundred one".