11556465517 has 2 divisors, whose sum is σ = 11556465518. Its totient is φ = 11556465516.

The previous prime is 11556465491. The next prime is 11556465527. The reversal of 11556465517 is 71556465511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9028990441 + 2527475076 = 95021^2 + 50274^2 .

It is a cyclic number.

It is not a de Polignac number, because 11556465517 - 2¹¹ = 11556463469 is a prime.

It is a super-2 number, since 2×11556465517² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11556465527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5778232758 + 5778232759.

It is an arithmetic number, because the mean of its divisors is an integer number (5778232759).

Almost surely, 2^11556465517 is an apocalyptic number.

It is an amenable number.

11556465517 is a deficient number, since it is larger than the sum of its proper divisors (1).

11556465517 is an equidigital number, since it uses as much as digits as its factorization.

11556465517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 630000, while the sum is 46.

The spelling of 11556465517 in words is "eleven billion, five hundred fifty-six million, four hundred sixty-five thousand, five hundred seventeen".