499985502128 has 80 divisors (see below), whose sum is σ = 1118544360960. Its totient is φ = 212069104128.

The previous prime is 499985502119. The next prime is 499985502143. The reversal of 499985502128 is 821205589994.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20140988 + ... + 20165796.

It is an arithmetic number, because the mean of its divisors is an integer number (13981804512).

Almost surely, 2^499985502128 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 499985502128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (559272180480).

499985502128 is an abundant number, since it is smaller than the sum of its proper divisors (618558858832).

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

499985502128 is a wasteful number, since it uses less digits than its factorization.

499985502128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26674 (or 26668 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 62.

The spelling of 499985502128 in words is "four hundred ninety-nine billion, nine hundred eighty-five million, five hundred two thousand, one hundred twenty-eight".