9999888742 has 16 divisors (see below), whose sum is σ = 15038971200. Its totient is φ = 4986916200.

The previous prime is 9999888719. The next prime is 9999888751. The reversal of 9999888742 is 2478889999.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1381609 + ... + 1388827.

It is an arithmetic number, because the mean of its divisors is an integer number (939935700).

Almost surely, 2^9999888742 is an apocalyptic number.

9999888742 is a deficient number, since it is larger than the sum of its proper divisors (5039082458).

9999888742 is a wasteful number, since it uses less digits than its factorization.

9999888742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8931.

The product of its digits is 188116992, while the sum is 73.

The square root of 9999888742 is about 99999.4437084527. The cubic root of 9999888742 is about 2154.4267000658.

The spelling of 9999888742 in words is "nine billion, nine hundred ninety-nine million, eight hundred eighty-eight thousand, seven hundred forty-two".