9944975819 has 8 divisors (see below), whose sum is σ = 10378471680. Its totient is φ = 9511572136.

The previous prime is 9944975797. The next prime is 9944975861. The reversal of 9944975819 is 9185794499.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9944975819 - 2²⁰ = 9943927243 is a prime.

It is a super-2 number, since 2×9944975819² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9944975419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285452 + ... + 318390.

It is an arithmetic number, because the mean of its divisors is an integer number (1297308960).

Almost surely, 2^9944975819 is an apocalyptic number.

9944975819 is a deficient number, since it is larger than the sum of its proper divisors (433495861).

9944975819 is a wasteful number, since it uses less digits than its factorization.

9944975819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46089.

The product of its digits is 29393280, while the sum is 65.

The square root of 9944975819 is about 99724.4995926277. The cubic root of 9944975819 is about 2150.4758866539.

The spelling of 9944975819 in words is "nine billion, nine hundred forty-four million, nine hundred seventy-five thousand, eight hundred nineteen".