25845745780 has 24 divisors (see below), whose sum is σ = 54297701640. Its totient is φ = 10334177280.

The previous prime is 25845745727. The next prime is 25845745799. The reversal of 25845745780 is 8754754852.

It can be written as a sum of positive squares in 4 ways, for example, as 223981156 + 25621764624 = 14966^2 + 160068^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205885 + ... + 306724.

It is an arithmetic number, because the mean of its divisors is an integer number (2262404235).

Almost surely, 2^25845745780 is an apocalyptic number.

25845745780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25845745780 is an abundant number, since it is smaller than the sum of its proper divisors (28451955860).

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

25845745780 is a wasteful number, since it uses less digits than its factorization.

25845745780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515139 (or 515137 counting only the distinct ones).

The product of its (nonzero) digits is 12544000, while the sum is 55.

The spelling of 25845745780 in words is "twenty-five billion, eight hundred forty-five million, seven hundred forty-five thousand, seven hundred eighty".