25507782557780 has 24 divisors (see below), whose sum is σ = 53575517506560. Its totient is φ = 10201365568800.

The previous prime is 25507782557771. The next prime is 25507782557809. The reversal of 25507782557780 is 8775528770552.

It is a self number, because there is not a number n which added to its sum of digits gives 25507782557780.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109096196 + ... + 109329755.

It is an arithmetic number, because the mean of its divisors is an integer number (2232313229440).

Almost surely, 2^{25507782557780} is an apocalyptic number.

25507782557780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25507782557780 is an abundant number, since it is smaller than the sum of its proper divisors (28067734948780).

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

25507782557780 is a wasteful number, since it uses less digits than its factorization.

25507782557780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218431799 (or 218431797 counting only the distinct ones).

The product of its (nonzero) digits is 384160000, while the sum is 68.

The spelling of 25507782557780 in words is "twenty-five trillion, five hundred seven billion, seven hundred eighty-two million, five hundred fifty-seven thousand, seven hundred eighty".