11551215135 has 16 divisors (see below), whose sum is σ = 19285507584. Its totient is φ = 5892793632.

The previous prime is 11551215121. The next prime is 11551215139. The reversal of 11551215135 is 53151215511.

It is not a de Polignac number, because 11551215135 - 2⁴ = 11551215119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11551215139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16740547 + ... + 16741236.

It is an arithmetic number, because the mean of its divisors is an integer number (1205344224).

Almost surely, 2^11551215135 is an apocalyptic number.

11551215135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11551215135 is a deficient number, since it is larger than the sum of its proper divisors (7734292449).

11551215135 is a wasteful number, since it uses less digits than its factorization.

11551215135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33481814.

The product of its digits is 3750, while the sum is 30.

The spelling of 11551215135 in words is "eleven billion, five hundred fifty-one million, two hundred fifteen thousand, one hundred thirty-five".