505944490844 has 24 divisors (see below), whose sum is σ = 954993743760. Its totient is φ = 233149665024.

The previous prime is 505944490823. The next prime is 505944490867. The reversal of 505944490844 is 448094449505.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 505944490844.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7532429 + ... + 7599300.

It is an arithmetic number, because the mean of its divisors is an integer number (39791405990).

Almost surely, 2^505944490844 is an apocalyptic number.

It is an amenable number.

505944490844 is a deficient number, since it is larger than the sum of its proper divisors (449049252916).

505944490844 is a wasteful number, since it uses less digits than its factorization.

505944490844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15132389 (or 15132387 counting only the distinct ones).

The product of its (nonzero) digits is 16588800, while the sum is 56.

The spelling of 505944490844 in words is "five hundred five billion, nine hundred forty-four million, four hundred ninety thousand, eight hundred forty-four".