25330338565 has 24 divisors (see below), whose sum is σ = 36314748792. Its totient is φ = 16899926400.

The previous prime is 25330338559. The next prime is 25330338569. The reversal of 25330338565 is 56583303352.

It can be written as a sum of positive squares in 4 ways, for example, as 4257171009 + 21073167556 = 65247^2 + 145166^2 .

It is not a de Polignac number, because 25330338565 - 2¹³ = 25330330373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25330338569) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1388086 + ... + 1406215.

It is an arithmetic number, because the mean of its divisors is an integer number (1513114533).

Almost surely, 2^25330338565 is an apocalyptic number.

It is an amenable number.

25330338565 is a deficient number, since it is larger than the sum of its proper divisors (10984410227).

25330338565 is a wasteful number, since it uses less digits than its factorization.

25330338565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2794357 (or 2794350 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 43.

The spelling of 25330338565 in words is "twenty-five billion, three hundred thirty million, three hundred thirty-eight thousand, five hundred sixty-five".