11512205511 has 8 divisors (see below), whose sum is σ = 15355238784. Its totient is φ = 7671987960.

The previous prime is 11512205501. The next prime is 11512205513. The reversal of 11512205511 is 11550221511.

11512205511 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 de Polignac number, because none of the positive numbers 2^k-11512205511 is a prime.

It is a super-2 number, since 2×11512205511² (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 (11512205513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 694371 + ... + 710756.

It is an arithmetic number, because the mean of its divisors is an integer number (1919404848).

Almost surely, 2^11512205511 is an apocalyptic number.

11512205511 is a deficient number, since it is larger than the sum of its proper divisors (3843033273).

11512205511 is a wasteful number, since it uses less digits than its factorization.

11512205511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407861.

The product of its (nonzero) digits is 500, while the sum is 24.

The spelling of 11512205511 in words is "eleven billion, five hundred twelve million, two hundred five thousand, five hundred eleven".