11815331399 has 2 divisors, whose sum is σ = 11815331400. Its totient is φ = 11815331398.

The previous prime is 11815331291. The next prime is 11815331491. The reversal of 11815331399 is 99313351811.

11815331399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11815331399 is a prime.

It is a super-3 number, since 3×11815331399³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11815330399) 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, 5907665699 + 5907665700.

It is an arithmetic number, because the mean of its divisors is an integer number (5907665700).

Almost surely, 2^11815331399 is an apocalyptic number.

11815331399 is a deficient number, since it is larger than the sum of its proper divisors (1).

11815331399 is an equidigital number, since it uses as much as digits as its factorization.

11815331399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 44.

The spelling of 11815331399 in words is "eleven billion, eight hundred fifteen million, three hundred thirty-one thousand, three hundred ninety-nine".