1364941209581 has 2 divisors, whose sum is σ = 1364941209582. Its totient is φ = 1364941209580.

The previous prime is 1364941209571. The next prime is 1364941209601. The reversal of 1364941209581 is 1859021494631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1358877472681 + 6063736900 = 1165709^2 + 77870^2 .

It is a cyclic number.

It is not a de Polignac number, because 1364941209581 - 2¹⁰ = 1364941208557 is a prime.

It is a super-2 number, since 2×1364941209581² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1364941209571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 682470604790 + 682470604791.

It is an arithmetic number, because the mean of its divisors is an integer number (682470604791).

Almost surely, 2^{1364941209581} is an apocalyptic number.

It is an amenable number.

1364941209581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1364941209581 is an equidigital number, since it uses as much as digits as its factorization.

1364941209581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 1364941209581 in words is "one trillion, three hundred sixty-four billion, nine hundred forty-one million, two hundred nine thousand, five hundred eighty-one".