504550550551 has 4 divisors (see below), whose sum is σ = 504561729672. Its totient is φ = 504539371432.

The previous prime is 504550550531. The next prime is 504550550597. The reversal of 504550550551 is 155055055405.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155055055405 = 5 ⋅31011011081.

It is a cyclic number.

It is not a de Polignac number, because 504550550551 - 2¹³ = 504550542359 is a prime.

It is a super-2 number, since 2×504550550551² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (504550550531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5521585 + ... + 5612218.

It is an arithmetic number, because the mean of its divisors is an integer number (126140432418).

Almost surely, 2^504550550551 is an apocalyptic number.

504550550551 is a deficient number, since it is larger than the sum of its proper divisors (11179121).

504550550551 is a wasteful number, since it uses less digits than its factorization.

504550550551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11179120.

The product of its (nonzero) digits is 312500, while the sum is 40.

The spelling of 504550550551 in words is "five hundred four billion, five hundred fifty million, five hundred fifty thousand, five hundred fifty-one".