25500830805 has 32 divisors (see below), whose sum is σ = 46011465600. Its totient is φ = 13397446656.

The previous prime is 25500830741. The next prime is 25500830809. The reversal of 25500830805 is 50803800552.

It is not a de Polignac number, because 25500830805 - 2⁶ = 25500830741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25500830805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25500830809) 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, 1400620 + ... + 1418709.

It is an arithmetic number, because the mean of its divisors is an integer number (1437858300).

Almost surely, 2^25500830805 is an apocalyptic number.

It is an amenable number.

25500830805 is a deficient number, since it is larger than the sum of its proper divisors (20510634795).

25500830805 is a wasteful number, since it uses less digits than its factorization.

25500830805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819410 (or 2819404 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The spelling of 25500830805 in words is "twenty-five billion, five hundred million, eight hundred thirty thousand, eight hundred five".