9941991498 has 24 divisors (see below), whose sum is σ = 21999302208. Its totient is φ = 3243486312.

The previous prime is 9941991491. The next prime is 9941991539. The reversal of 9941991498 is 8941991499.

9941991498 is a `hidden beast` number, since 99 + 419 + 91 + 49 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (9941991491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5875036 + ... + 5876727.

It is an arithmetic number, because the mean of its divisors is an integer number (916637592).

Almost surely, 2^9941991498 is an apocalyptic number.

9941991498 is an abundant number, since it is smaller than the sum of its proper divisors (12057310710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9941991498 is a wasteful number, since it uses less digits than its factorization.

9941991498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11751818 (or 11751815 counting only the distinct ones).

The product of its digits is 7558272, while the sum is 63.

The square root of 9941991498 is about 99709.5356422845. The cubic root of 9941991498 is about 2150.2607578451.

Subtracting from 9941991498 its reverse (8941991499), we obtain a palindrome (999999999).

The spelling of 9941991498 in words is "nine billion, nine hundred forty-one million, nine hundred ninety-one thousand, four hundred ninety-eight".