505631655104101 has 4 divisors (see below), whose sum is σ = 505632120802252. Its totient is φ = 505631189405952.

The previous prime is 505631655104087. The next prime is 505631655104123. The reversal of 505631655104101 is 101401556136505.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22237345491201 + 483394309612900 = 4715649^2 + 21986230^2 .

It is a cyclic number.

It is not a de Polignac number, because 505631655104101 - 2²³ = 505631646715493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505631655104141) 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, 231216636 + ... + 233393221.

It is an arithmetic number, because the mean of its divisors is an integer number (126408030200563).

Almost surely, 2^{505631655104101} is an apocalyptic number.

It is an amenable number.

505631655104101 is a deficient number, since it is larger than the sum of its proper divisors (465698151).

505631655104101 is a wasteful number, since it uses less digits than its factorization.

505631655104101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465698150.

The product of its (nonzero) digits is 270000, while the sum is 43.

The spelling of 505631655104101 in words is "five hundred five trillion, six hundred thirty-one billion, six hundred fifty-five million, one hundred four thousand, one hundred one".