25553881686629 has 2 divisors, whose sum is σ = 25553881686630. Its totient is φ = 25553881686628.

The previous prime is 25553881686617. The next prime is 25553881686673. The reversal of 25553881686629 is 92668618835552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21053552212225 + 4500329474404 = 4588415^2 + 2121398^2 .

It is a cyclic number.

It is not a de Polignac number, because 25553881686629 - 2⁸ = 25553881686373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25553881686679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12776940843314 + 12776940843315.

It is an arithmetic number, because the mean of its divisors is an integer number (12776940843315).

Almost surely, 2^{25553881686629} is an apocalyptic number.

It is an amenable number.

25553881686629 is a deficient number, since it is larger than the sum of its proper divisors (1).

25553881686629 is an equidigital number, since it uses as much as digits as its factorization.

25553881686629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1492992000, while the sum is 74.

The spelling of 25553881686629 in words is "twenty-five trillion, five hundred fifty-three billion, eight hundred eighty-one million, six hundred eighty-six thousand, six hundred twenty-nine".