505212115164 has 24 divisors (see below), whose sum is σ = 1178848555920. Its totient is φ = 168401140224.

The previous prime is 505212115157. The next prime is 505212115169. The reversal of 505212115164 is 461511212505.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505212115169) 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, 434092 + ... + 1094924.

It is an arithmetic number, because the mean of its divisors is an integer number (49118689830).

Almost surely, 2^505212115164 is an apocalyptic number.

It is an amenable number.

505212115164 is an abundant number, since it is smaller than the sum of its proper divisors (673636440756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

505212115164 is a wasteful number, since it uses less digits than its factorization.

505212115164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724549 (or 724547 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 33.

Adding to 505212115164 its reverse (461511212505), we get a palindrome (966723327669).

The spelling of 505212115164 in words is "five hundred five billion, two hundred twelve million, one hundred fifteen thousand, one hundred sixty-four".