499364785721 has 8 divisors (see below), whose sum is σ = 505756172160. Its totient is φ = 492990744928.

The previous prime is 499364785687. The next prime is 499364785781. The reversal of 499364785721 is 127587463994.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 499364785721 - 2⁶ = 499364785657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (499364785781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4278461 + ... + 4393626.

It is an arithmetic number, because the mean of its divisors is an integer number (63219521520).

Almost surely, 2^499364785721 is an apocalyptic number.

It is an amenable number.

499364785721 is a deficient number, since it is larger than the sum of its proper divisors (6391386439).

499364785721 is an equidigital number, since it uses as much as digits as its factorization.

499364785721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8672823.

The product of its digits is 91445760, while the sum is 65.

The spelling of 499364785721 in words is "four hundred ninety-nine billion, three hundred sixty-four million, seven hundred eighty-five thousand, seven hundred twenty-one".