515055065550 has 48 divisors (see below), whose sum is σ = 1277840593920. Its totient is φ = 137293820640.

The previous prime is 515055065543. The next prime is 515055065597. The reversal of 515055065550 is 55560550515.

It is a Curzon number.

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, 295342 + ... + 1057041.

It is an arithmetic number, because the mean of its divisors is an integer number (26621679040).

Almost surely, 2^515055065550 is an apocalyptic number.

515055065550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

515055065550 is an abundant number, since it is smaller than the sum of its proper divisors (762785528370).

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

515055065550 is a wasteful number, since it uses less digits than its factorization.

515055065550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354937 (or 1354932 counting only the distinct ones).

The product of its (nonzero) digits is 468750, while the sum is 42.

The spelling of 515055065550 in words is "five hundred fifteen billion, fifty-five million, sixty-five thousand, five hundred fifty".