2594389925521 has 9 divisors (see below), whose sum is σ = 2599695146811. Its totient is φ = 2589095518464.

The previous prime is 2594389925467. The next prime is 2594389925531. The reversal of 2594389925521 is 1255299834952.

The square root of 2594389925521 is 1610711.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 93690475921 + 2500699449600 = 306089^2 + 1581360^2 .

It is not a de Polignac number, because 2594389925521 - 2¹⁷ = 2594389794449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2594389925531) 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 8 ways as a sum of consecutive naturals, for example, 964814545 + ... + 964817233.

Almost surely, 2^{2594389925521} is an apocalyptic number.

2594389925521 is the 1610711-st square number.

2594389925521 is the 805356-th centered octagonal number.

It is an amenable number.

2594389925521 is a deficient number, since it is larger than the sum of its proper divisors (5305221290).

2594389925521 is an frugal number, since it uses more digits than its factorization.

2594389925521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6576 (or 3288 counting only the distinct ones).

The product of its digits is 69984000, while the sum is 64.

Multiplying 2594389925521 by its sum of digits (64), we get a square (166040955233344 = 12885688²).

The spelling of 2594389925521 in words is "two trillion, five hundred ninety-four billion, three hundred eighty-nine million, nine hundred twenty-five thousand, five hundred twenty-one".