11998647479 has 32 divisors (see below), whose sum is σ = 15073618560. Its totient is φ = 9298022400.

The previous prime is 11998647461. The next prime is 11998647511. The reversal of 11998647479 is 97474689911.

It is a cyclic number.

It is not a de Polignac number, because 11998647479 - 2²⁸ = 11730212023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11998647439) 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 31 ways as a sum of consecutive naturals, for example, 1333307 + ... + 1342275.

It is an arithmetic number, because the mean of its divisors is an integer number (471050580).

Almost surely, 2^11998647479 is an apocalyptic number.

11998647479 is a deficient number, since it is larger than the sum of its proper divisors (3074971081).

11998647479 is a wasteful number, since it uses less digits than its factorization.

11998647479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9291.

The product of its digits is 27433728, while the sum is 65.

The spelling of 11998647479 in words is "eleven billion, nine hundred ninety-eight million, six hundred forty-seven thousand, four hundred seventy-nine".