25825778280 has 48 divisors (see below), whose sum is σ = 83933780580. Its totient is φ = 6886874112.

The previous prime is 25825778257. The next prime is 25825778287. The reversal of 25825778280 is 8287752852.

25825778280 is a `hidden beast` number, since 2 + 582 + 57 + 7 + 8 + 2 + 8 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25777586916 + 48191364 = 160554^2 + 6942^2 .

It is not an unprimeable number, because it can be changed into a prime (25825778287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35868777 + ... + 35869496.

Almost surely, 2^25825778280 is an apocalyptic number.

25825778280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25825778280 is an abundant number, since it is smaller than the sum of its proper divisors (58108002300).

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

25825778280 is a wasteful number, since it uses less digits than its factorization.

25825778280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71738290 (or 71738283 counting only the distinct ones).

The product of its (nonzero) digits is 5017600, while the sum is 54.

The spelling of 25825778280 in words is "twenty-five billion, eight hundred twenty-five million, seven hundred seventy-eight thousand, two hundred eighty".