505240444536 has 128 divisors (see below), whose sum is σ = 1372940236800. Its totient is φ = 154349936640.

The previous prime is 505240444531. The next prime is 505240444537. The reversal of 505240444536 is 635444042505.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505240444531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67750120 + ... + 67757576.

It is an arithmetic number, because the mean of its divisors is an integer number (10726095600).

Almost surely, 2^505240444536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 505240444536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (686470118400).

505240444536 is an abundant number, since it is smaller than the sum of its proper divisors (867699792264).

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

505240444536 is a wasteful number, since it uses less digits than its factorization.

505240444536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12309 (or 12305 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 42.

The spelling of 505240444536 in words is "five hundred five billion, two hundred forty million, four hundred forty-four thousand, five hundred thirty-six".