55111974912 has 360 divisors, whose sum is σ = 171284236200. Its totient is φ = 17638096896.

The previous prime is 55111974887. The next prime is 55111974937. The reversal of 55111974912 is 21947911155.

55111974912 is a `hidden beast` number, since 5 + 511 + 1 + 97 + 49 + 1 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (55111974887) and next prime (55111974937).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 307888039 + ... + 307888217.

It is an arithmetic number, because the mean of its divisors is an integer number (475789545).

Almost surely, 2^55111974912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55111974912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85642118100).

55111974912 is an abundant number, since it is smaller than the sum of its proper divisors (116172261288).

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

55111974912 is an frugal number, since it uses more digits than its factorization.

55111974912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 213 counting only the distinct ones).

The product of its digits is 113400, while the sum is 45.

The spelling of 55111974912 in words is "fifty-five billion, one hundred eleven million, nine hundred seventy-four thousand, nine hundred twelve".