7167442816421 has 2 divisors, whose sum is σ = 7167442816422. Its totient is φ = 7167442816420.

The previous prime is 7167442816367. The next prime is 7167442816439. The reversal of 7167442816421 is 1246182447617.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5655293023396 + 1512149793025 = 2378086^2 + 1229695^2 .

It is a cyclic number.

It is not a de Polignac number, because 7167442816421 - 2⁶ = 7167442816357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7167442816441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3583721408210 + 3583721408211.

It is an arithmetic number, because the mean of its divisors is an integer number (3583721408211).

Almost surely, 2^{7167442816421} is an apocalyptic number.

It is an amenable number.

7167442816421 is a deficient number, since it is larger than the sum of its proper divisors (1).

7167442816421 is an equidigital number, since it uses as much as digits as its factorization.

7167442816421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3612672, while the sum is 53.

The spelling of 7167442816421 in words is "seven trillion, one hundred sixty-seven billion, four hundred forty-two million, eight hundred sixteen thousand, four hundred twenty-one".