25278528628563 has 32 divisors (see below), whose sum is σ = 39770735247360. Its totient is φ = 13975920571680.

The previous prime is 25278528628559. The next prime is 25278528628571. The reversal of 25278528628563 is 36582682587252.

It is not a de Polignac number, because 25278528628563 - 2² = 25278528628559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25278528628513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1103395 + ... + 7195452.

It is an arithmetic number, because the mean of its divisors is an integer number (1242835476480).

Almost surely, 2^{25278528628563} is an apocalyptic number.

25278528628563 is a deficient number, since it is larger than the sum of its proper divisors (14492206618797).

25278528628563 is a wasteful number, since it uses less digits than its factorization.

25278528628563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8303567.

The product of its digits is 774144000, while the sum is 69.

The spelling of 25278528628563 in words is "twenty-five trillion, two hundred seventy-eight billion, five hundred twenty-eight million, six hundred twenty-eight thousand, five hundred sixty-three".