55111974911 has 4 divisors (see below), whose sum is σ = 62985114192. Its totient is φ = 47238835632.

The previous prime is 55111974887. The next prime is 55111974937. The reversal of 55111974911 is 11947911155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11947911155 = 5 ⋅2389582231.

It is a cyclic number.

It is not a de Polignac number, because 55111974911 - 2³⁰ = 54038233087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55111974961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3936569630 + ... + 3936569643.

It is an arithmetic number, because the mean of its divisors is an integer number (15746278548).

Almost surely, 2^55111974911 is an apocalyptic number.

55111974911 is a deficient number, since it is larger than the sum of its proper divisors (7873139281).

55111974911 is an equidigital number, since it uses as much as digits as its factorization.

55111974911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7873139280.

The product of its digits is 56700, while the sum is 44.

The spelling of 55111974911 in words is "fifty-five billion, one hundred eleven million, nine hundred seventy-four thousand, nine hundred eleven".