11515381439 has 2 divisors, whose sum is σ = 11515381440. Its totient is φ = 11515381438.

The previous prime is 11515381417. The next prime is 11515381453. The reversal of 11515381439 is 93418351511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11515381439 - 2⁸ = 11515381183 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 11515381396 and 11515381405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11515381459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5757690719 + 5757690720.

It is an arithmetic number, because the mean of its divisors is an integer number (5757690720).

Almost surely, 2^11515381439 is an apocalyptic number.

11515381439 is a deficient number, since it is larger than the sum of its proper divisors (1).

11515381439 is an equidigital number, since it uses as much as digits as its factorization.

11515381439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 41.

The spelling of 11515381439 in words is "eleven billion, five hundred fifteen million, three hundred eighty-one thousand, four hundred thirty-nine".