11997116647 has 8 divisors (see below), whose sum is σ = 12303225792. Its totient is φ = 11693126400.

The previous prime is 11997116617. The next prime is 11997116669. The reversal of 11997116647 is 74661179911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11997116647 - 2¹¹ = 11997114599 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11997116594 and 11997116603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11997116617) 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 7 ways as a sum of consecutive naturals, for example, 518254 + ... + 540907.

It is an arithmetic number, because the mean of its divisors is an integer number (1537903224).

Almost surely, 2^11997116647 is an apocalyptic number.

11997116647 is a deficient number, since it is larger than the sum of its proper divisors (306109145).

11997116647 is a wasteful number, since it uses less digits than its factorization.

11997116647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059449.

The product of its digits is 571536, while the sum is 52.

The spelling of 11997116647 in words is "eleven billion, nine hundred ninety-seven million, one hundred sixteen thousand, six hundred forty-seven".