7138123640441 has 2 divisors, whose sum is σ = 7138123640442. Its totient is φ = 7138123640440.

The previous prime is 7138123640393. The next prime is 7138123640443. The reversal of 7138123640441 is 1440463218317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3850052244025 + 3288071396416 = 1962155^2 + 1813304^2 .

It is a cyclic number.

It is not a de Polignac number, because 7138123640441 - 2⁶ = 7138123640377 is a prime.

Together with 7138123640443, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 7138123640392 and 7138123640401.

It is not a weakly prime, because it can be changed into another prime (7138123640443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3569061820220 + 3569061820221.

It is an arithmetic number, because the mean of its divisors is an integer number (3569061820221).

Almost surely, 2^{7138123640441} is an apocalyptic number.

It is an amenable number.

7138123640441 is a deficient number, since it is larger than the sum of its proper divisors (1).

7138123640441 is an equidigital number, since it uses as much as digits as its factorization.

7138123640441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 44.

Adding to 7138123640441 its reverse (1440463218317), we get a palindrome (8578586858758).

The spelling of 7138123640441 in words is "seven trillion, one hundred thirty-eight billion, one hundred twenty-three million, six hundred forty thousand, four hundred forty-one".