1975564379317 has 2 divisors, whose sum is σ = 1975564379318. Its totient is φ = 1975564379316.

The previous prime is 1975564379303. The next prime is 1975564379363. The reversal of 1975564379317 is 7139734655791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1896828580516 + 78735798801 = 1377254^2 + 280599^2 .

It is an emirp because it is prime and its reverse (7139734655791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1975564379317 - 2³¹ = 1973416895669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1975564389317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987782189658 + 987782189659.

It is an arithmetic number, because the mean of its divisors is an integer number (987782189659).

Almost surely, 2^{1975564379317} is an apocalyptic number.

It is an amenable number.

1975564379317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1975564379317 is an equidigital number, since it uses as much as digits as its factorization.

1975564379317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150028200, while the sum is 67.

The spelling of 1975564379317 in words is "one trillion, nine hundred seventy-five billion, five hundred sixty-four million, three hundred seventy-nine thousand, three hundred seventeen".