11515511479 has 2 divisors, whose sum is σ = 11515511480. Its totient is φ = 11515511478.

The previous prime is 11515511467. The next prime is 11515511537. The reversal of 11515511479 is 97411551511.

It is a happy number.

11515511479 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (97411551511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11515511479 - 2⁷ = 11515511351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11515511419) 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 as a sum of consecutive naturals, namely, 5757755739 + 5757755740.

It is an arithmetic number, because the mean of its divisors is an integer number (5757755740).

Almost surely, 2^11515511479 is an apocalyptic number.

11515511479 is a deficient number, since it is larger than the sum of its proper divisors (1).

11515511479 is an equidigital number, since it uses as much as digits as its factorization.

11515511479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31500, while the sum is 40.

The spelling of 11515511479 in words is "eleven billion, five hundred fifteen million, five hundred eleven thousand, four hundred seventy-nine".