11994881697 has 24 divisors (see below), whose sum is σ = 18370990560. Its totient is φ = 7520402880.

The previous prime is 11994881687. The next prime is 11994881711. The reversal of 11994881697 is 79618849911.

11994881697 is a `hidden beast` number, since 1 + 1 + 99 + 488 + 1 + 69 + 7 = 666.

It is not a de Polignac number, because 11994881697 - 2⁴ = 11994881681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11994881687) by changing a digit.

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, 232579 + ... + 279432.

It is an arithmetic number, because the mean of its divisors is an integer number (765457940).

Almost surely, 2^11994881697 is an apocalyptic number.

It is an amenable number.

11994881697 is a deficient number, since it is larger than the sum of its proper divisors (6376108863).

11994881697 is a wasteful number, since it uses less digits than its factorization.

11994881697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512173 (or 512170 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 63.

The spelling of 11994881697 in words is "eleven billion, nine hundred ninety-four million, eight hundred eighty-one thousand, six hundred ninety-seven".