11405605155 has 32 divisors (see below), whose sum is σ = 20911065600. Its totient is φ = 5200215552.

The previous prime is 11405605147. The next prime is 11405605177. The reversal of 11405605155 is 55150650411.

It is not a de Polignac number, because 11405605155 - 2³ = 11405605147 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103510 + ... + 183099.

It is an arithmetic number, because the mean of its divisors is an integer number (653470800).

Almost surely, 2^11405605155 is an apocalyptic number.

11405605155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11405605155 is a deficient number, since it is larger than the sum of its proper divisors (9505460445).

11405605155 is a wasteful number, since it uses less digits than its factorization.

11405605155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287003.

The product of its (nonzero) digits is 15000, while the sum is 33.

The spelling of 11405605155 in words is "eleven billion, four hundred five million, six hundred five thousand, one hundred fifty-five".