11512321455 has 16 divisors (see below), whose sum is σ = 18522622080. Its totient is φ = 6105602208.

The previous prime is 11512321439. The next prime is 11512321459. The reversal of 11512321455 is 55412321511.

11512321455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11512321455 - 2⁴ = 11512321439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11512321459) 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 15 ways as a sum of consecutive naturals, for example, 2141137 + ... + 2146506.

It is an arithmetic number, because the mean of its divisors is an integer number (1157663880).

Almost surely, 2^11512321455 is an apocalyptic number.

11512321455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11512321455 is a deficient number, since it is larger than the sum of its proper divisors (7010300625).

11512321455 is a wasteful number, since it uses less digits than its factorization.

11512321455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4287830.

The product of its digits is 6000, while the sum is 30.

Adding to 11512321455 its reverse (55412321511), we get a palindrome (66924642966).

The spelling of 11512321455 in words is "eleven billion, five hundred twelve million, three hundred twenty-one thousand, four hundred fifty-five".