50555555550 has 72 divisors (see below), whose sum is σ = 137352168720. Its totient is φ = 13329993600.

The previous prime is 50555555549. The next prime is 50555555569. The reversal of 50555555550 is 5555555505.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 50555555496 and 50555555505.

It is a congruent 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, 591106 + ... + 671205.

It is an arithmetic number, because the mean of its divisors is an integer number (1907669010).

Almost surely, 2^50555555550 is an apocalyptic number.

50555555550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

50555555550 is an abundant number, since it is smaller than the sum of its proper divisors (86796613170).

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

50555555550 is a wasteful number, since it uses less digits than its factorization.

50555555550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262418 (or 1262410 counting only the distinct ones).

The product of its (nonzero) digits is 1953125, while the sum is 45.

Subtracting from 50555555550 its sum of digits (45), we obtain a palindrome (50555555505).

The spelling of 50555555550 in words is "fifty billion, five hundred fifty-five million, five hundred fifty-five thousand, five hundred fifty".