25669998605780 has 24 divisors (see below), whose sum is σ = 54121765995360. Its totient is φ = 10227091076000.

The previous prime is 25669998605767. The next prime is 25669998605807. The reversal of 25669998605780 is 8750689996652.

It is a junction number, because it is equal to n+sod(n) for n = 25669998605695 and 25669998605704.

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, 2556767750 + ... + 2556777789.

It is an arithmetic number, because the mean of its divisors is an integer number (2255073583140).

Almost surely, 2^{25669998605780} is an apocalyptic number.

25669998605780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25669998605780 is an abundant number, since it is smaller than the sum of its proper divisors (28451767389580).

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

25669998605780 is a wasteful number, since it uses less digits than its factorization.

25669998605780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5113545799 (or 5113545797 counting only the distinct ones).

The product of its (nonzero) digits is 3527193600, while the sum is 80.

The spelling of 25669998605780 in words is "twenty-five trillion, six hundred sixty-nine billion, nine hundred ninety-eight million, six hundred five thousand, seven hundred eighty".