2605214541621 has 12 divisors (see below), whose sum is σ = 3689969386592. Its totient is φ = 1634644417728.

The previous prime is 2605214541607. The next prime is 2605214541623. The reversal of 2605214541621 is 1261454125062.

It is not a de Polignac number, because 2605214541621 - 2⁷ = 2605214541493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2605214541621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2605214541623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1502429665 + ... + 1502431398.

Almost surely, 2^{2605214541621} is an apocalyptic number.

It is an amenable number.

2605214541621 is a deficient number, since it is larger than the sum of its proper divisors (1084754844971).

2605214541621 is a wasteful number, since it uses less digits than its factorization.

2605214541621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3004861100 (or 3004861083 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 39.

Adding to 2605214541621 its reverse (1261454125062), we get a palindrome (3866668666683).

The spelling of 2605214541621 in words is "two trillion, six hundred five billion, two hundred fourteen million, five hundred forty-one thousand, six hundred twenty-one".