505050505550 has 48 divisors (see below), whose sum is σ = 955539435312. Its totient is φ = 198572774400.

The previous prime is 505050505543. The next prime is 505050505577. The reversal of 505050505550 is 55505050505.

It is a self number, because there is not a number n which added to its sum of digits gives 505050505550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 508670 + ... + 1126430.

It is an arithmetic number, because the mean of its divisors is an integer number (19907071569).

Almost surely, 2^505050505550 is an apocalyptic number.

505050505550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

505050505550 is a deficient number, since it is larger than the sum of its proper divisors (450488929762).

505050505550 is a wasteful number, since it uses less digits than its factorization.

505050505550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618053 (or 618048 counting only the distinct ones).

The product of its (nonzero) digits is 78125, while the sum is 35.

The spelling of 505050505550 in words is "five hundred five billion, fifty million, five hundred five thousand, five hundred fifty".