25769745584881 has 3 divisors (see below), whose sum is σ = 25769750661273. Its totient is φ = 25769740508490.

The previous prime is 25769745584861. The next prime is 25769745584941. The reversal of 25769745584881 is 18848554796752.

The square root of 25769745584881 is 5076391.

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 25769745584881 - 2⁹ = 25769745584369 is a prime.

It is a super-2 number, since 2×25769745584881² (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 (25769745584861) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2538196 + ... + 7614586.

It is an arithmetic number, because the mean of its divisors is an integer number (8589916887091).

Almost surely, 2^{25769745584881} is an apocalyptic number.

25769745584881 is the 5076391-st square number.

25769745584881 is the 2538196-th centered octagonal number.

It is an amenable number.

25769745584881 is a deficient number, since it is larger than the sum of its proper divisors (5076392).

25769745584881 is an frugal number, since it uses more digits than its factorization.

25769745584881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10152782 (or 5076391 counting only the distinct ones).

The product of its digits is 5419008000, while the sum is 79.

The spelling of 25769745584881 in words is "twenty-five trillion, seven hundred sixty-nine billion, seven hundred forty-five million, five hundred eighty-four thousand, eight hundred eighty-one".