11515316611157 has 2 divisors, whose sum is σ = 11515316611158. Its totient is φ = 11515316611156.

The previous prime is 11515316611091. The next prime is 11515316611219. The reversal of 11515316611157 is 75111661351511.

11515316611157 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 can be written as a sum of positive squares in only one way, i.e., 8652692870116 + 2862623741041 = 2941546^2 + 1691929^2 .

It is a cyclic number.

It is not a de Polignac number, because 11515316611157 - 2²⁶ = 11515249502293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11515316611657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5757658305578 + 5757658305579.

It is an arithmetic number, because the mean of its divisors is an integer number (5757658305579).

Almost surely, 2^{11515316611157} is an apocalyptic number.

It is an amenable number.

11515316611157 is a deficient number, since it is larger than the sum of its proper divisors (1).

11515316611157 is an equidigital number, since it uses as much as digits as its factorization.

11515316611157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94500, while the sum is 44.

Adding to 11515316611157 its reverse (75111661351511), we get a palindrome (86626977962668).

The spelling of 11515316611157 in words is "eleven trillion, five hundred fifteen billion, three hundred sixteen million, six hundred eleven thousand, one hundred fifty-seven".