8049688225681 has 2 divisors, whose sum is σ = 8049688225682. Its totient is φ = 8049688225680.

The previous prime is 8049688225679. The next prime is 8049688225729. The reversal of 8049688225681 is 1865228869408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6891570032400 + 1158118193281 = 2625180^2 + 1076159^2 .

It is a cyclic number.

It is not a de Polignac number, because 8049688225681 - 2¹ = 8049688225679 is a prime.

It is a super-2 number, since 2×8049688225681² (a number of 27 digits) contains 22 as substring.

Together with 8049688225679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (8049688225181) 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, 4024844112840 + 4024844112841.

It is an arithmetic number, because the mean of its divisors is an integer number (4024844112841).

Almost surely, 2^{8049688225681} is an apocalyptic number.

It is an amenable number.

8049688225681 is a deficient number, since it is larger than the sum of its proper divisors (1).

8049688225681 is an equidigital number, since it uses as much as digits as its factorization.

8049688225681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 106168320, while the sum is 67.

The spelling of 8049688225681 in words is "eight trillion, forty-nine billion, six hundred eighty-eight million, two hundred twenty-five thousand, six hundred eighty-one".