11115551479 has 2 divisors, whose sum is σ = 11115551480. Its totient is φ = 11115551478.

The previous prime is 11115551459. The next prime is 11115551519. The reversal of 11115551479 is 97415551111.

It is a happy number.

It is an a-pointer prime, because the next prime (11115551519) can be obtained adding 11115551479 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11115551479 - 2¹⁹ = 11115027191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11115551459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5557775739 + 5557775740.

It is an arithmetic number, because the mean of its divisors is an integer number (5557775740).

Almost surely, 2^11115551479 is an apocalyptic number.

11115551479 is a deficient number, since it is larger than the sum of its proper divisors (1).

11115551479 is an equidigital number, since it uses as much as digits as its factorization.

11115551479 is an evil number, because the sum of its binary digits is even.

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

The spelling of 11115551479 in words is "eleven billion, one hundred fifteen million, five hundred fifty-one thousand, four hundred seventy-nine".