505728644248 has 32 divisors (see below), whose sum is σ = 952523582400. Its totient is φ = 251723057152.

The previous prime is 505728644219. The next prime is 505728644251. The reversal of 505728644248 is 842446827505.

It is a happy number.

It is a super-2 number, since 2×505728644248² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5955786 + ... + 6040102.

It is an arithmetic number, because the mean of its divisors is an integer number (29766361950).

Almost surely, 2^505728644248 is an apocalyptic number.

It is an amenable number.

505728644248 is a deficient number, since it is larger than the sum of its proper divisors (446794938152).

505728644248 is a wasteful number, since it uses less digits than its factorization.

505728644248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87699 (or 87695 counting only the distinct ones).

The product of its (nonzero) digits is 17203200, while the sum is 55.

The spelling of 505728644248 in words is "five hundred five billion, seven hundred twenty-eight million, six hundred forty-four thousand, two hundred forty-eight".