3440521693681 has 2 divisors, whose sum is σ = 3440521693682. Its totient is φ = 3440521693680.

The previous prime is 3440521693627. The next prime is 3440521693691. The reversal of 3440521693681 is 1863961250443.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3047524352656 + 392997341025 = 1745716^2 + 626895^2 .

It is a cyclic number.

It is not a de Polignac number, because 3440521693681 - 2⁴¹ = 1241498438129 is a prime.

It is a super-2 number, since 2×3440521693681² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3440521693691) 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, 1720260846840 + 1720260846841.

It is an arithmetic number, because the mean of its divisors is an integer number (1720260846841).

Almost surely, 2^{3440521693681} is an apocalyptic number.

It is an amenable number.

3440521693681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3440521693681 is an equidigital number, since it uses as much as digits as its factorization.

3440521693681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3732480, while the sum is 52.

The spelling of 3440521693681 in words is "three trillion, four hundred forty billion, five hundred twenty-one million, six hundred ninety-three thousand, six hundred eighty-one".