55111111650 has 72 divisors (see below), whose sum is σ = 169217365824. Its totient is φ = 12596824800.

The previous prime is 55111111633. The next prime is 55111111691. The reversal of 55111111650 is 5611111155.

55111111650 is a `hidden beast` number, since 5 + 5 + 1 + 1 + 1 + 1 + 1 + 1 + 650 = 666.

55111111650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8744646 + ... + 8750945.

It is an arithmetic number, because the mean of its divisors is an integer number (2350241192).

Almost surely, 2^55111111650 is an apocalyptic number.

55111111650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55111111650 is an abundant number, since it is smaller than the sum of its proper divisors (114106254174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55111111650 is a wasteful number, since it uses less digits than its factorization.

55111111650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17495616 (or 17495608 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 27.

The spelling of 55111111650 in words is "fifty-five billion, one hundred eleven million, one hundred eleven thousand, six hundred fifty".