11939744997 has 24 divisors (see below), whose sum is σ = 18441610200. Its totient is φ = 7417420800.

The previous prime is 11939744977. The next prime is 11939745001. The reversal of 11939744997 is 79944793911.

11939744997 is a `hidden beast` number, since 1 + 19 + 3 + 97 + 449 + 97 = 666.

11939744997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3154619556 + 8785125441 = 56166^2 + 93729^2 .

It is not a de Polignac number, because 11939744997 - 2⁸ = 11939744741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11939744977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 370872 + ... + 401777.

It is an arithmetic number, because the mean of its divisors is an integer number (768400425).

Almost surely, 2^11939744997 is an apocalyptic number.

11939744997 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

11939744997 is a deficient number, since it is larger than the sum of its proper divisors (6501865203).

11939744997 is a wasteful number, since it uses less digits than its factorization.

11939744997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772773 (or 772770 counting only the distinct ones).

The product of its digits is 15431472, while the sum is 63.

The spelling of 11939744997 in words is "eleven billion, nine hundred thirty-nine million, seven hundred forty-four thousand, nine hundred ninety-seven".