6641412263257 has 2 divisors, whose sum is σ = 6641412263258. Its totient is φ = 6641412263256.

The previous prime is 6641412263243. The next prime is 6641412263263. The reversal of 6641412263257 is 7523622141466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5557056590281 + 1084355672976 = 2357341^2 + 1041324^2 .

It is a cyclic number.

It is not a de Polignac number, because 6641412263257 - 2³⁹ = 6091656449369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6641412263257.

It is not a weakly prime, because it can be changed into another prime (6641412263287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3320706131628 + 3320706131629.

It is an arithmetic number, because the mean of its divisors is an integer number (3320706131629).

Almost surely, 2^{6641412263257} is an apocalyptic number.

It is an amenable number.

6641412263257 is a deficient number, since it is larger than the sum of its proper divisors (1).

6641412263257 is an equidigital number, since it uses as much as digits as its factorization.

6641412263257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 49.

The spelling of 6641412263257 in words is "six trillion, six hundred forty-one billion, four hundred twelve million, two hundred sixty-three thousand, two hundred fifty-seven".