7811667142241 has 2 divisors, whose sum is σ = 7811667142242. Its totient is φ = 7811667142240.

The previous prime is 7811667142229. The next prime is 7811667142273. The reversal of 7811667142241 is 1422417661187.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6549100292641 + 1262566849600 = 2559121^2 + 1123640^2 .

It is a cyclic number.

It is not a de Polignac number, because 7811667142241 - 2¹⁰ = 7811667141217 is a prime.

It is a super-2 number, since 2×7811667142241² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7811667142241.

It is not a weakly prime, because it can be changed into another prime (7811667141241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3905833571120 + 3905833571121.

It is an arithmetic number, because the mean of its divisors is an integer number (3905833571121).

Almost surely, 2^{7811667142241} is an apocalyptic number.

It is an amenable number.

7811667142241 is a deficient number, since it is larger than the sum of its proper divisors (1).

7811667142241 is an equidigital number, since it uses as much as digits as its factorization.

7811667142241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 903168, while the sum is 50.

The spelling of 7811667142241 in words is "seven trillion, eight hundred eleven billion, six hundred sixty-seven million, one hundred forty-two thousand, two hundred forty-one".