25802671903 has 4 divisors (see below), whose sum is σ = 26692419240. Its totient is φ = 24912924568.

The previous prime is 25802671861. The next prime is 25802672009. The reversal of 25802671903 is 30917620852.

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 25802671903 - 2²⁵ = 25769117471 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25802671903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25802611903) 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, 444873625 + ... + 444873682.

It is an arithmetic number, because the mean of its divisors is an integer number (6673104810).

Almost surely, 2^25802671903 is an apocalyptic number.

25802671903 is a deficient number, since it is larger than the sum of its proper divisors (889747337).

25802671903 is an equidigital number, since it uses as much as digits as its factorization.

25802671903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889747336.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 25802671903 in words is "twenty-five billion, eight hundred two million, six hundred seventy-one thousand, nine hundred three".