499917521880 has 576 divisors, whose sum is σ = 1975595581440. Its totient is φ = 107375611392.

The previous prime is 499917521827. The next prime is 499917521881. The reversal of 499917521880 is 88125719994.

499917521880 is a `hidden beast` number, since 4 + 9 + 99 + 17 + 521 + 8 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499917521881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 115532277 + ... + 115536603.

It is an arithmetic number, because the mean of its divisors is an integer number (3429853440).

Almost surely, 2^499917521880 is an apocalyptic number.

499917521880 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 499917521880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (987797790720).

499917521880 is an abundant number, since it is smaller than the sum of its proper divisors (1475678059560).

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

499917521880 is a wasteful number, since it uses less digits than its factorization.

499917521880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4516 (or 4490 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 63.

The spelling of 499917521880 in words is "four hundred ninety-nine billion, nine hundred seventeen million, five hundred twenty-one thousand, eight hundred eighty".