11661155150055 has 16 divisors (see below), whose sum is σ = 18696799918080. Its totient is φ = 6206298854048.

The previous prime is 11661155150003. The next prime is 11661155150069. The reversal of 11661155150055 is 55005155116611.

It is a cyclic number.

It is not a de Polignac number, because 11661155150055 - 2²⁵ = 11661121595623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11661155149989 and 11661155150016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 811485867 + ... + 811500236.

It is an arithmetic number, because the mean of its divisors is an integer number (1168549994880).

Almost surely, 2^{11661155150055} is an apocalyptic number.

11661155150055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11661155150055 is a deficient number, since it is larger than the sum of its proper divisors (7035644768025).

11661155150055 is a wasteful number, since it uses less digits than its factorization.

11661155150055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622986590.

The product of its (nonzero) digits is 112500, while the sum is 42.

The spelling of 11661155150055 in words is "eleven trillion, six hundred sixty-one billion, one hundred fifty-five million, one hundred fifty thousand, fifty-five".