25800000775 has 6 divisors (see below), whose sum is σ = 31992000992. Its totient is φ = 20640000600.

The previous prime is 25800000773. The next prime is 25800000799. The reversal of 25800000775 is 57700000852.

It is not a de Polignac number, because 25800000775 - 2¹ = 25800000773 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 25800000775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25800000773) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 515999991 + ... + 516000040.

Almost surely, 2^25800000775 is an apocalyptic number.

25800000775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25800000775 is a deficient number, since it is larger than the sum of its proper divisors (6192000217).

25800000775 is a wasteful number, since it uses less digits than its factorization.

25800000775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032000041 (or 1032000036 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 34.

The spelling of 25800000775 in words is "twenty-five billion, eight hundred million, seven hundred seventy-five", and thus it is an aban number.