11513533531511 has 8 divisors (see below), whose sum is σ = 12565200664848. Its totient is φ = 10462696776000.

The previous prime is 11513533531481. The next prime is 11513533531553.

11513533531511 is nontrivially palindromic in base 10.

11513533531511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11513533531511 is a prime.

It is a super-2 number, since 2×11513533531511² (a number of 27 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 (11513533531111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207565460 + ... + 207620921.

It is an arithmetic number, because the mean of its divisors is an integer number (1570650083106).

Almost surely, 2^{11513533531511} is an apocalyptic number.

11513533531511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11513533531511 is a deficient number, since it is larger than the sum of its proper divisors (1051667133337).

11513533531511 is a wasteful number, since it uses less digits than its factorization.

11513533531511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415188913.

The product of its digits is 50625, while the sum is 38.

It can be divided in two parts, 1151353 and 3531511, that added together give a palindrome (4682864).

The spelling of 11513533531511 in words is "eleven trillion, five hundred thirteen billion, five hundred thirty-three million, five hundred thirty-one thousand, five hundred eleven".