7145743105681 has 2 divisors, whose sum is σ = 7145743105682. Its totient is φ = 7145743105680.

The previous prime is 7145743105663. The next prime is 7145743105727. The reversal of 7145743105681 is 1865013475417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6009440405056 + 1136302700625 = 2451416^2 + 1065975^2 .

It is an emirp because it is prime and its reverse (1865013475417) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7145743105681 - 2⁵ = 7145743105649 is a prime.

It is a super-2 number, since 2×7145743105681² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7145743105381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3572871552840 + 3572871552841.

It is an arithmetic number, because the mean of its divisors is an integer number (3572871552841).

Almost surely, 2^{7145743105681} is an apocalyptic number.

It is an amenable number.

7145743105681 is a deficient number, since it is larger than the sum of its proper divisors (1).

7145743105681 is an equidigital number, since it uses as much as digits as its factorization.

7145743105681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2822400, while the sum is 52.

The spelling of 7145743105681 in words is "seven trillion, one hundred forty-five billion, seven hundred forty-three million, one hundred five thousand, six hundred eighty-one".