1326875543657 has 2 divisors, whose sum is σ = 1326875543658. Its totient is φ = 1326875543656.

The previous prime is 1326875543641. The next prime is 1326875543677. The reversal of 1326875543657 is 7563455786231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1254050584336 + 72824959321 = 1119844^2 + 269861^2 .

It is a cyclic number.

It is not a de Polignac number, because 1326875543657 - 2⁴ = 1326875543641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1326875543657.

It is not a weakly prime, because it can be changed into another prime (1326875543677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663437771828 + 663437771829.

It is an arithmetic number, because the mean of its divisors is an integer number (663437771829).

Almost surely, 2^{1326875543657} is an apocalyptic number.

It is an amenable number.

1326875543657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326875543657 is an equidigital number, since it uses as much as digits as its factorization.

1326875543657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008000, while the sum is 62.

The spelling of 1326875543657 in words is "one trillion, three hundred twenty-six billion, eight hundred seventy-five million, five hundred forty-three thousand, six hundred fifty-seven".