2605063621 has 8 divisors (see below), whose sum is σ = 2648930904. Its totient is φ = 2561233920.

The previous prime is 2605063607. The next prime is 2605063633. The reversal of 2605063621 is 1263605062.

2605063621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 84100 + 2604979521 = 290^2 + 51039^2 .

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 2605063621 - 2¹¹ = 2605061573 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 (2605063661) 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, 154041 + ... + 170113.

It is an arithmetic number, because the mean of its divisors is an integer number (331116363).

Almost surely, 2^2605063621 is an apocalyptic number.

It is an amenable number.

2605063621 is a deficient number, since it is larger than the sum of its proper divisors (43867283).

2605063621 is a wasteful number, since it uses less digits than its factorization.

2605063621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18791.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 2605063621 is about 51039.8238731287. The cubic root of 2605063621 is about 1375.9609583988.

Adding to 2605063621 its reverse (1263605062), we get a palindrome (3868668683).

The spelling of 2605063621 in words is "two billion, six hundred five million, sixty-three thousand, six hundred twenty-one".