499804423621 has 8 divisors (see below), whose sum is σ = 529449611544. Its totient is φ = 470186449920.

The previous prime is 499804423619. The next prime is 499804423673. The reversal of 499804423621 is 126324408994.

It can be written as a sum of positive squares in 4 ways, for example, as 44295516225 + 455508907396 = 210465^2 + 674914^2 .

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 499804423621 - 2¹ = 499804423619 is a prime.

It is a super-2 number, since 2×499804423621² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499804463621) 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, 6765730 + ... + 6839203.

It is an arithmetic number, because the mean of its divisors is an integer number (66181201443).

Almost surely, 2^499804423621 is an apocalyptic number.

It is an amenable number.

499804423621 is a deficient number, since it is larger than the sum of its proper divisors (29645187923).

499804423621 is a wasteful number, since it uses less digits than its factorization.

499804423621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13607111.

The product of its (nonzero) digits is 2985984, while the sum is 52.

The spelling of 499804423621 in words is "four hundred ninety-nine billion, eight hundred four million, four hundred twenty-three thousand, six hundred twenty-one".