25802857775 has 6 divisors (see below), whose sum is σ = 31995543672. Its totient is φ = 20642286200.

The previous prime is 25802857733. The next prime is 25802857789. The reversal of 25802857775 is 57775820852.

It is not a de Polignac number, because 25802857775 - 2⁸ = 25802857519 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 25802857775.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 516057131 + ... + 516057180.

It is an arithmetic number, because the mean of its divisors is an integer number (5332590612).

Almost surely, 2^25802857775 is an apocalyptic number.

25802857775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25802857775 is a deficient number, since it is larger than the sum of its proper divisors (6192685897).

25802857775 is a wasteful number, since it uses less digits than its factorization.

25802857775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032114321 (or 1032114316 counting only the distinct ones).

The product of its (nonzero) digits is 10976000, while the sum is 56.

The spelling of 25802857775 in words is "twenty-five billion, eight hundred two million, eight hundred fifty-seven thousand, seven hundred seventy-five".