9257461286581 has 2 divisors, whose sum is σ = 9257461286582. Its totient is φ = 9257461286580.

The previous prime is 9257461286569. The next prime is 9257461286663. The reversal of 9257461286581 is 1856821647529.

9257461286581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8317075316356 + 940385970225 = 2883934^2 + 969735^2 .

It is an emirp because it is prime and its reverse (1856821647529) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9257461286581 - 2⁷ = 9257461286453 is a prime.

It is a super-2 number, since 2×9257461286581² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9257468286581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4628730643290 + 4628730643291.

It is an arithmetic number, because the mean of its divisors is an integer number (4628730643291).

Almost surely, 2^{9257461286581} is an apocalyptic number.

It is an amenable number.

9257461286581 is a deficient number, since it is larger than the sum of its proper divisors (1).

9257461286581 is an equidigital number, since it uses as much as digits as its factorization.

9257461286581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58060800, while the sum is 64.

The spelling of 9257461286581 in words is "nine trillion, two hundred fifty-seven billion, four hundred sixty-one million, two hundred eighty-six thousand, five hundred eighty-one".