115565565511 has 4 divisors (see below), whose sum is σ = 126071526024. Its totient is φ = 105059605000.

The previous prime is 115565565503. The next prime is 115565565559.

It is a happy number.

115565565511 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 115565565511 - 2³ = 115565565503 is a prime.

It is a super-2 number, since 2×115565565511² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115565568511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5252980240 + ... + 5252980261.

It is an arithmetic number, because the mean of its divisors is an integer number (31517881506).

Almost surely, 2^115565565511 is an apocalyptic number.

115565565511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

115565565511 is a deficient number, since it is larger than the sum of its proper divisors (10505960513).

115565565511 is a wasteful number, since it uses less digits than its factorization.

115565565511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10505960512.

The product of its digits is 562500, while the sum is 46.

The spelling of 115565565511 in words is "one hundred fifteen billion, five hundred sixty-five million, five hundred sixty-five thousand, five hundred eleven".