11973887471 has 16 divisors (see below), whose sum is σ = 14752378368. Its totient is φ = 9464018400.

The previous prime is 11973887467. The next prime is 11973887477. The reversal of 11973887471 is 17478837911.

It is a cyclic number.

It is not a de Polignac number, because 11973887471 - 2² = 11973887467 is a prime.

It is a super-3 number, since 3×11973887471³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11973887477) 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 15 ways as a sum of consecutive naturals, for example, 20606 + ... + 156116.

It is an arithmetic number, because the mean of its divisors is an integer number (922023648).

Almost surely, 2^11973887471 is an apocalyptic number.

11973887471 is a deficient number, since it is larger than the sum of its proper divisors (2778490897).

11973887471 is a wasteful number, since it uses less digits than its factorization.

11973887471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136502.

The product of its digits is 2370816, while the sum is 56.

The spelling of 11973887471 in words is "eleven billion, nine hundred seventy-three million, eight hundred eighty-seven thousand, four hundred seventy-one".