25555828355 has 4 divisors (see below), whose sum is σ = 30666994032. Its totient is φ = 20444662680.

The previous prime is 25555828351. The next prime is 25555828387. The reversal of 25555828355 is 55382855552.

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

It is not a de Polignac number, because 25555828355 - 2² = 25555828351 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25555828297 and 25555828306.

It is not an unprimeable number, because it can be changed into a prime (25555828351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2555582831 + ... + 2555582840.

It is an arithmetic number, because the mean of its divisors is an integer number (7666748508).

Almost surely, 2^25555828355 is an apocalyptic number.

25555828355 is a deficient number, since it is larger than the sum of its proper divisors (5111165677).

25555828355 is an equidigital number, since it uses as much as digits as its factorization.

25555828355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5111165676.

The product of its digits is 12000000, while the sum is 53.

The spelling of 25555828355 in words is "twenty-five billion, five hundred fifty-five million, eight hundred twenty-eight thousand, three hundred fifty-five".