11111112345567 has 16 divisors (see below), whose sum is σ = 15955285233888. Its totient is φ = 6837235808640.

The previous prime is 11111112345521. The next prime is 11111112345587. The reversal of 11111112345567 is 76554321111111.

It is not a de Polignac number, because 11111112345567 - 2⁷ = 11111112345439 is a prime.

It is a super-2 number, since 2×11111112345567² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111112345587) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7018284 + ... + 8454497.

It is an arithmetic number, because the mean of its divisors is an integer number (997205327118).

Almost surely, 2^{11111112345567} is an apocalyptic number.

11111112345567 is a deficient number, since it is larger than the sum of its proper divisors (4844172888321).

11111112345567 is a wasteful number, since it uses less digits than its factorization.

11111112345567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15491210.

The product of its digits is 25200, while the sum is 39.

Adding to 11111112345567 its reverse (76554321111111), we get a palindrome (87665433456678).

The spelling of 11111112345567 in words is "eleven trillion, one hundred eleven billion, one hundred twelve million, three hundred forty-five thousand, five hundred sixty-seven".