11155501655091 has 12 divisors (see below), whose sum is σ = 16340453129520. Its totient is φ = 7332254608560.

The previous prime is 11155501655071. The next prime is 11155501655099. The reversal of 11155501655091 is 19055610555111.

11155501655091 is a `hidden beast` number, since 1 + 1 + 1 + 5 + 5 + 5 + 0 + 1 + 6 + 550 + 91 = 666.

11155501655091 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 11155501655091 - 2¹⁴ = 11155501638707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11155501655099) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8728873896 + ... + 8728875173.

It is an arithmetic number, because the mean of its divisors is an integer number (1361704427460).

Almost surely, 2^{11155501655091} is an apocalyptic number.

11155501655091 is a deficient number, since it is larger than the sum of its proper divisors (5184951474429).

11155501655091 is a wasteful number, since it uses less digits than its factorization.

11155501655091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17457749146 (or 17457749143 counting only the distinct ones).

The product of its (nonzero) digits is 168750, while the sum is 45.

The spelling of 11155501655091 in words is "eleven trillion, one hundred fifty-five billion, five hundred one million, six hundred fifty-five thousand, ninety-one".