11307128511 has 64 divisors (see below), whose sum is σ = 18433310720. Its totient is φ = 6028888320.

The previous prime is 11307128489. The next prime is 11307128527. The reversal of 11307128511 is 11582170311.

It is not a de Polignac number, because 11307128511 - 2²² = 11302934207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11307128531) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2208891 + ... + 2214003.

It is an arithmetic number, because the mean of its divisors is an integer number (288020480).

Almost surely, 2^11307128511 is an apocalyptic number.

11307128511 is a deficient number, since it is larger than the sum of its proper divisors (7126182209).

11307128511 is a wasteful number, since it uses less digits than its factorization.

11307128511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5276.

The product of its (nonzero) digits is 1680, while the sum is 30.

Adding to 11307128511 its reverse (11582170311), we get a palindrome (22889298822).

The spelling of 11307128511 in words is "eleven billion, three hundred seven million, one hundred twenty-eight thousand, five hundred eleven".