7138121573543 has 2 divisors, whose sum is σ = 7138121573544. Its totient is φ = 7138121573542.

The previous prime is 7138121573461. The next prime is 7138121573573. The reversal of 7138121573543 is 3453751218317.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7138121573543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7138121573491 and 7138121573500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7138121573573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3569060786771 + 3569060786772.

It is an arithmetic number, because the mean of its divisors is an integer number (3569060786772).

Almost surely, 2^{7138121573543} is an apocalyptic number.

7138121573543 is a deficient number, since it is larger than the sum of its proper divisors (1).

7138121573543 is an equidigital number, since it uses as much as digits as its factorization.

7138121573543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2116800, while the sum is 50.

The spelling of 7138121573543 in words is "seven trillion, one hundred thirty-eight billion, one hundred twenty-one million, five hundred seventy-three thousand, five hundred forty-three".