25455765749761 has 4 divisors (see below), whose sum is σ = 25458090700500. Its totient is φ = 25453440799024.

The previous prime is 25455765749759. The next prime is 25455765749773. The reversal of 25455765749761 is 16794756755452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 729561972736 + 24726203777025 = 854144^2 + 4972545^2 .

It is a cyclic number.

It is not a de Polignac number, because 25455765749761 - 2¹ = 25455765749759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25455765740761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1162458946 + ... + 1162480843.

It is an arithmetic number, because the mean of its divisors is an integer number (6364522675125).

Almost surely, 2^{25455765749761} is an apocalyptic number.

It is an amenable number.

25455765749761 is a deficient number, since it is larger than the sum of its proper divisors (2324950739).

25455765749761 is a wasteful number, since it uses less digits than its factorization.

25455765749761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2324950738.

The product of its digits is 2222640000, while the sum is 73.

The spelling of 25455765749761 in words is "twenty-five trillion, four hundred fifty-five billion, seven hundred sixty-five million, seven hundred forty-nine thousand, seven hundred sixty-one".