9940497994 has 48 divisors (see below), whose sum is σ = 17618964480. Its totient is φ = 4193169120.

The previous prime is 9940497971. The next prime is 9940498019. The reversal of 9940497994 is 4997940499.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7771447 + ... + 7772725.

It is an arithmetic number, because the mean of its divisors is an integer number (367061760).

Almost surely, 2^9940497994 is an apocalyptic number.

9940497994 is a deficient number, since it is larger than the sum of its proper divisors (7678466486).

9940497994 is a wasteful number, since it uses less digits than its factorization.

9940497994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2483 (or 2476 counting only the distinct ones).

The product of its (nonzero) digits is 26453952, while the sum is 64.

The square root of 9940497994 is about 99702.0460873296. The cubic root of 9940497994 is about 2150.1530804290.

The spelling of 9940497994 in words is "nine billion, nine hundred forty million, four hundred ninety-seven thousand, nine hundred ninety-four".