499037661920 has 144 divisors (see below), whose sum is σ = 1372707898128. Its totient is φ = 170943252480.

The previous prime is 499037661901. The next prime is 499037661953. The reversal of 499037661920 is 29166730994.

It is a Harshad number since it is a multiple of its sum of digits (56).

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 23 ways as a sum of consecutive naturals, for example, 8775980 + ... + 8832660.

It is an arithmetic number, because the mean of its divisors is an integer number (9532693737).

Almost surely, 2^499037661920 is an apocalyptic number.

499037661920 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 499037661920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (686353949064).

499037661920 is an abundant number, since it is smaller than the sum of its proper divisors (873670236208).

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

499037661920 is a wasteful number, since it uses less digits than its factorization.

499037661920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57833 (or 57818 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 56.

The spelling of 499037661920 in words is "four hundred ninety-nine billion, thirty-seven million, six hundred sixty-one thousand, nine hundred twenty".