621543325605 has 16 divisors (see below), whose sum is σ = 1003592895360. Its totient is φ = 328448582208.

The previous prime is 621543325603. The next prime is 621543325639. The reversal of 621543325605 is 506523345126.

It is a happy number.

It is not a de Polignac number, because 621543325605 - 2¹ = 621543325603 is a prime.

It is a super-2 number, since 2×621543325605² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621543325603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190072777 + ... + 190076046.

It is an arithmetic number, because the mean of its divisors is an integer number (62724555960).

Almost surely, 2^621543325605 is an apocalyptic number.

It is an amenable number.

621543325605 is a deficient number, since it is larger than the sum of its proper divisors (382049569755).

621543325605 is a wasteful number, since it uses less digits than its factorization.

621543325605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380148940.

The product of its (nonzero) digits is 648000, while the sum is 42.

The spelling of 621543325605 in words is "six hundred twenty-one billion, five hundred forty-three million, three hundred twenty-five thousand, six hundred five".