25285788340 has 48 divisors (see below), whose sum is σ = 53681518800. Its totient is φ = 10003788800.

The previous prime is 25285788301. The next prime is 25285788361. The reversal of 25285788340 is 4388758252.

It can be written as a sum of positive squares in 8 ways, for example, as 9253670416 + 16032117924 = 96196^2 + 126618^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2113014 + ... + 2124946.

It is an arithmetic number, because the mean of its divisors is an integer number (1118364975).

Almost surely, 2^25285788340 is an apocalyptic number.

25285788340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25285788340 is an abundant number, since it is smaller than the sum of its proper divisors (28395730460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25285788340 is a wasteful number, since it uses less digits than its factorization.

25285788340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13092 (or 13090 counting only the distinct ones).

The product of its (nonzero) digits is 4300800, while the sum is 52.

The spelling of 25285788340 in words is "twenty-five billion, two hundred eighty-five million, seven hundred eighty-eight thousand, three hundred forty".