505500355525550 has 96 divisors (see below), whose sum is σ = 1172646821585664. Its totient is φ = 157503284640000.

The previous prime is 505500355525549. The next prime is 505500355525553. The reversal of 505500355525550 is 55525553005505.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505500355525553) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12050447 + ... + 34003146.

It is an arithmetic number, because the mean of its divisors is an integer number (12215071058184).

Almost surely, 2^{505500355525550} is an apocalyptic number.

505500355525550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

505500355525550 is an abundant number, since it is smaller than the sum of its proper divisors (667146466060114).

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

505500355525550 is a wasteful number, since it uses less digits than its factorization.

505500355525550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46056474 (or 46056469 counting only the distinct ones).

The product of its (nonzero) digits is 11718750, while the sum is 50.

The spelling of 505500355525550 in words is "five hundred five trillion, five hundred billion, three hundred fifty-five million, five hundred twenty-five thousand, five hundred fifty".