25280252780551 has 4 divisors (see below), whose sum is σ = 26610792400600. Its totient is φ = 23949713160504.

The previous prime is 25280252780521. The next prime is 25280252780569. The reversal of 25280252780551 is 15508725208252.

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

It is a cyclic number.

It is not a de Polignac number, because 25280252780551 - 2⁷ = 25280252780423 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 (25280252780521) 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, 665269809996 + ... + 665269810033.

It is an arithmetic number, because the mean of its divisors is an integer number (6652698100150).

Almost surely, 2^{25280252780551} is an apocalyptic number.

25280252780551 is a deficient number, since it is larger than the sum of its proper divisors (1330539620049).

25280252780551 is a wasteful number, since it uses less digits than its factorization.

25280252780551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330539620048.

The product of its (nonzero) digits is 4480000, while the sum is 52.

The spelling of 25280252780551 in words is "twenty-five trillion, two hundred eighty billion, two hundred fifty-two million, seven hundred eighty thousand, five hundred fifty-one".