505500505549 has 8 divisors (see below), whose sum is σ = 544416659640. Its totient is φ = 466588851456.

The previous prime is 505500505519. The next prime is 505500505621. The reversal of 505500505549 is 945505005505.

It can be written as a sum of positive squares in 4 ways, for example, as 63494928324 + 442005577225 = 251982^2 + 664835^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 505500505549 - 2¹⁵ = 505500472781 is a prime.

It is a super-2 number, since 2×505500505549² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505500505519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 889864 + ... + 1342705.

It is an arithmetic number, because the mean of its divisors is an integer number (68052082455).

Almost surely, 2^505500505549 is an apocalyptic number.

It is an amenable number.

505500505549 is a deficient number, since it is larger than the sum of its proper divisors (38916154091).

505500505549 is a wasteful number, since it uses less digits than its factorization.

505500505549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249999.

The product of its (nonzero) digits is 562500, while the sum is 43.

The spelling of 505500505549 in words is "five hundred five billion, five hundred million, five hundred five thousand, five hundred forty-nine".