11513243511 has 48 divisors (see below), whose sum is σ = 20754639360. Its totient is φ = 5974896960.

The previous prime is 11513243479. The next prime is 11513243519. The reversal of 11513243511 is 11534231511.

11513243511 is a `hidden beast` number, since 1 + 15 + 132 + 4 + 3 + 511 = 666.

It is not a de Polignac number, because 11513243511 - 2⁵ = 11513243479 is a prime.

It is a super-2 number, since 2×11513243511² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11513243519) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 728845 + ... + 744473.

It is an arithmetic number, because the mean of its divisors is an integer number (432388320).

Almost surely, 2^11513243511 is an apocalyptic number.

11513243511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11513243511 is a deficient number, since it is larger than the sum of its proper divisors (9241395849).

11513243511 is a wasteful number, since it uses less digits than its factorization.

11513243511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16716 (or 16713 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The spelling of 11513243511 in words is "eleven billion, five hundred thirteen million, two hundred forty-three thousand, five hundred eleven".