7405938216749 has 2 divisors, whose sum is σ = 7405938216750. Its totient is φ = 7405938216748.

The previous prime is 7405938216739. The next prime is 7405938216767. The reversal of 7405938216749 is 9476128395047.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5221179300100 + 2184758916649 = 2284990^2 + 1478093^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7405938216749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7405938216739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3702969108374 + 3702969108375.

It is an arithmetic number, because the mean of its divisors is an integer number (3702969108375).

It is a 1-persistent number, because it is pandigital, but 2⋅7405938216749 = 14811876433498 is not.

Almost surely, 2^{7405938216749} is an apocalyptic number.

It is an amenable number.

7405938216749 is a deficient number, since it is larger than the sum of its proper divisors (1).

7405938216749 is an equidigital number, since it uses as much as digits as its factorization.

7405938216749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91445760, while the sum is 65.

The spelling of 7405938216749 in words is "seven trillion, four hundred five billion, nine hundred thirty-eight million, two hundred sixteen thousand, seven hundred forty-nine".