11663142055 has 4 divisors (see below), whose sum is σ = 13995770472. Its totient is φ = 9330513640.

The previous prime is 11663142017. The next prime is 11663142091. The reversal of 11663142055 is 55024136611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55024136611 = 4561 ⋅12064051.

It is not a de Polignac number, because 11663142055 - 2⁹ = 11663141543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11663142055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1166314201 + ... + 1166314210.

It is an arithmetic number, because the mean of its divisors is an integer number (3498942618).

Almost surely, 2^11663142055 is an apocalyptic number.

11663142055 is a deficient number, since it is larger than the sum of its proper divisors (2332628417).

11663142055 is an equidigital number, since it uses as much as digits as its factorization.

11663142055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2332628416.

The product of its (nonzero) digits is 21600, while the sum is 34.

Adding to 11663142055 its reverse (55024136611), we get a palindrome (66687278666).

The spelling of 11663142055 in words is "eleven billion, six hundred sixty-three million, one hundred forty-two thousand, fifty-five".