11516111669 has 2 divisors, whose sum is σ = 11516111670. Its totient is φ = 11516111668.

The previous prime is 11516111609. The next prime is 11516111681. The reversal of 11516111669 is 96611161511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11292250225 + 223861444 = 106265^2 + 14962^2 .

It is a cyclic number.

It is not a de Polignac number, because 11516111669 - 2¹² = 11516107573 is a prime.

It is a super-2 number, since 2×11516111669² (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 (11516111609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5758055834 + 5758055835.

It is an arithmetic number, because the mean of its divisors is an integer number (5758055835).

Almost surely, 2^11516111669 is an apocalyptic number.

It is an amenable number.

11516111669 is a deficient number, since it is larger than the sum of its proper divisors (1).

11516111669 is an equidigital number, since it uses as much as digits as its factorization.

11516111669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 38.

The spelling of 11516111669 in words is "eleven billion, five hundred sixteen million, one hundred eleven thousand, six hundred sixty-nine".