1641224976257 has 2 divisors, whose sum is σ = 1641224976258. Its totient is φ = 1641224976256.

The previous prime is 1641224976247. The next prime is 1641224976269. The reversal of 1641224976257 is 7526794221461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1204778445376 + 436446530881 = 1097624^2 + 660641^2 .

It is a cyclic number.

It is not a de Polignac number, because 1641224976257 - 2⁴ = 1641224976241 is a prime.

It is not a weakly prime, because it can be changed into another prime (1641224976247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820612488128 + 820612488129.

It is an arithmetic number, because the mean of its divisors is an integer number (820612488129).

Almost surely, 2^{1641224976257} is an apocalyptic number.

It is an amenable number.

1641224976257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641224976257 is an equidigital number, since it uses as much as digits as its factorization.

1641224976257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10160640, while the sum is 56.

The spelling of 1641224976257 in words is "one trillion, six hundred forty-one billion, two hundred twenty-four million, nine hundred seventy-six thousand, two hundred fifty-seven".