25278741549463 has 4 divisors (see below), whose sum is σ = 25280106289768. Its totient is φ = 25277376809160.

The previous prime is 25278741549433. The next prime is 25278741549473. The reversal of 25278741549463 is 36494514787252.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25278741549463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25278741549433) 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, 682342368 + ... + 682379413.

It is an arithmetic number, because the mean of its divisors is an integer number (6320026572442).

Almost surely, 2^{25278741549463} is an apocalyptic number.

25278741549463 is a deficient number, since it is larger than the sum of its proper divisors (1364740305).

25278741549463 is a wasteful number, since it uses less digits than its factorization.

25278741549463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364740304.

The product of its digits is 406425600, while the sum is 67.

The spelling of 25278741549463 in words is "twenty-five trillion, two hundred seventy-eight billion, seven hundred forty-one million, five hundred forty-nine thousand, four hundred sixty-three".