7811438364311 has 2 divisors, whose sum is σ = 7811438364312. Its totient is φ = 7811438364310.

The previous prime is 7811438364281. The next prime is 7811438364329. The reversal of 7811438364311 is 1134638341187.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7811438364311 is a prime.

It is a super-2 number, since 2×7811438364311² (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 7811438364311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7811438367311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3905719182155 + 3905719182156.

It is an arithmetic number, because the mean of its divisors is an integer number (3905719182156).

Almost surely, 2^{7811438364311} is an apocalyptic number.

7811438364311 is a deficient number, since it is larger than the sum of its proper divisors (1).

7811438364311 is an equidigital number, since it uses as much as digits as its factorization.

7811438364311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 50.

The spelling of 7811438364311 in words is "seven trillion, eight hundred eleven billion, four hundred thirty-eight million, three hundred sixty-four thousand, three hundred eleven".