505050550551 has 24 divisors (see below), whose sum is σ = 748465964064. Its totient is φ = 327980298240.

The previous prime is 505050550531. The next prime is 505050550679. The reversal of 505050550551 is 155055050505.

It is a happy number.

505050550551 is a `hidden beast` number, since 5 + 0 + 5 + 0 + 50 + 5 + 50 + 551 = 666.

It is not a de Polignac number, because 505050550551 - 2²⁹ = 504513679639 is a prime.

It is a super-2 number, since 2×505050550551² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505050550531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 818986 + ... + 1296471.

It is an arithmetic number, because the mean of its divisors is an integer number (31186081836).

Almost surely, 2^505050550551 is an apocalyptic number.

505050550551 is a deficient number, since it is larger than the sum of its proper divisors (243415413513).

505050550551 is a wasteful number, since it uses less digits than its factorization.

505050550551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116151 (or 2116148 counting only the distinct ones).

The product of its (nonzero) digits is 78125, while the sum is 36.

The spelling of 505050550551 in words is "five hundred five billion, fifty million, five hundred fifty thousand, five hundred fifty-one".