506420403621 has 16 divisors (see below), whose sum is σ = 736629189120. Its totient is φ = 306914084720.

The previous prime is 506420403617. The next prime is 506420403623. The reversal of 506420403621 is 126304024605.

It is a cyclic number.

It is not a de Polignac number, because 506420403621 - 2² = 506420403617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506420403623) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1418440 + ... + 1739198.

It is an arithmetic number, because the mean of its divisors is an integer number (46039324320).

Almost surely, 2^506420403621 is an apocalyptic number.

It is an amenable number.

506420403621 is a deficient number, since it is larger than the sum of its proper divisors (230208785499).

506420403621 is a wasteful number, since it uses less digits than its factorization.

506420403621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368616.

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 506420403621 in words is "five hundred six billion, four hundred twenty million, four hundred three thousand, six hundred twenty-one".