55000000050 has 288 divisors, whose sum is σ = 150323485824. Its totient is φ = 13277721600.

The previous prime is 55000000039. The next prime is 55000000087. The reversal of 55000000050 is 5000000055.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 54999999966 and 55000000029.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 175718694 + ... + 175719006.

It is an arithmetic number, because the mean of its divisors is an integer number (521956548).

Almost surely, 2^55000000050 is an apocalyptic number.

55000000050 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55000000050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75161742912).

55000000050 is an abundant number, since it is smaller than the sum of its proper divisors (95323485774).

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

55000000050 is a wasteful number, since it uses less digits than its factorization.

55000000050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466 (or 430 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 15.

The spelling of 55000000050 in words is "fifty-five billion, fifty", and thus it is an aban number and an uban number.