605610603621 has 6 divisors (see below), whose sum is σ = 874770871910. Its totient is φ = 403740402408.

The previous prime is 605610603589. The next prime is 605610603623. The reversal of 605610603621 is 126306016506.

605610603621 is a `hidden beast` number, since 6 + 0 + 5 + 610 + 6 + 0 + 36 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 314172581121 + 291438022500 = 560511^2 + 539850^2 .

It is not a de Polignac number, because 605610603621 - 2⁵ = 605610603589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605610603623) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33645033526 + ... + 33645033543.

Almost surely, 2^605610603621 is an apocalyptic number.

It is an amenable number.

605610603621 is a deficient number, since it is larger than the sum of its proper divisors (269160268289).

605610603621 is a wasteful number, since it uses less digits than its factorization.

605610603621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67290067075 (or 67290067072 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 605610603621 in words is "six hundred five billion, six hundred ten million, six hundred three thousand, six hundred twenty-one".