25517076382249 has 3 divisors (see below), whose sum is σ = 25517081433693. Its totient is φ = 25517071330806.

The previous prime is 25517076382247. The next prime is 25517076382283. The reversal of 25517076382249 is 94228367071552.

It is a happy number.

The square root of 25517076382249 is 5051443.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 25517076382249 - 2¹ = 25517076382247 is a prime.

It is a super-2 number, since 2×25517076382249² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25517076382243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2525722 + ... + 7577164.

It is an arithmetic number, because the mean of its divisors is an integer number (8505693811231).

It is a 2-persistent number, because it is pandigital, and so is 2⋅25517076382249 = 51034152764498, but 3⋅25517076382249 = 76551229146747 is not.

Almost surely, 2^{25517076382249} is an apocalyptic number.

25517076382249 is the 5051443-rd square number.

25517076382249 is the 2525722-nd centered octagonal number.

It is an amenable number.

25517076382249 is a deficient number, since it is larger than the sum of its proper divisors (5051444).

25517076382249 is an frugal number, since it uses more digits than its factorization.

25517076382249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10102886 (or 5051443 counting only the distinct ones).

The product of its (nonzero) digits is 50803200, while the sum is 61.

The spelling of 25517076382249 in words is "twenty-five trillion, five hundred seventeen billion, seventy-six million, three hundred eighty-two thousand, two hundred forty-nine".