25481979286686 has 32 divisors (see below), whose sum is σ = 60982514533920. Its totient is φ = 7840609011072.

The previous prime is 25481979286681. The next prime is 25481979286693. The reversal of 25481979286686 is 68668297918452.

25481979286686 is a `hidden beast` number, since 2 + 5 + 481 + 9 + 79 + 2 + 8 + 6 + 68 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25481979286681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18149557195 + ... + 18149558598.

It is an arithmetic number, because the mean of its divisors is an integer number (1905703579185).

Almost surely, 2^{25481979286686} is an apocalyptic number.

25481979286686 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

25481979286686 is an abundant number, since it is smaller than the sum of its proper divisors (35500535247234).

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

25481979286686 is a wasteful number, since it uses less digits than its factorization.

25481979286686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36299115817 (or 36299115811 counting only the distinct ones).

The product of its digits is 5016453120, while the sum is 81.

The spelling of 25481979286686 in words is "twenty-five trillion, four hundred eighty-one billion, nine hundred seventy-nine million, two hundred eighty-six thousand, six hundred eighty-six".