505212634621 has 4 divisors (see below), whose sum is σ = 517534894044. Its totient is φ = 492890375200.

The previous prime is 505212634601. The next prime is 505212634643. The reversal of 505212634621 is 126436212505.

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 184079612025 + 321133022596 = 429045^2 + 566686^2 .

It is a cyclic number.

It is not a de Polignac number, because 505212634621 - 2⁹ = 505212634109 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 (505212634601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6161129650 + ... + 6161129731.

It is an arithmetic number, because the mean of its divisors is an integer number (129383723511).

Almost surely, 2^505212634621 is an apocalyptic number.

It is an amenable number.

505212634621 is a deficient number, since it is larger than the sum of its proper divisors (12322259423).

505212634621 is a wasteful number, since it uses less digits than its factorization.

505212634621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12322259422.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 505212634621 in words is "five hundred five billion, two hundred twelve million, six hundred thirty-four thousand, six hundred twenty-one".