438464367078349 has 2 divisors, whose sum is σ = 438464367078350. Its totient is φ = 438464367078348.

The previous prime is 438464367078323. The next prime is 438464367078371. The reversal of 438464367078349 is 943870763464834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255488831424324 + 182975535654025 = 15984018^2 + 13526845^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438464367078349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438464367078319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219232183539174 + 219232183539175.

It is an arithmetic number, because the mean of its divisors is an integer number (219232183539175).

Almost surely, 2^{438464367078349} is an apocalyptic number.

It is an amenable number.

438464367078349 is a deficient number, since it is larger than the sum of its proper divisors (1).

438464367078349 is an equidigital number, since it uses as much as digits as its factorization.

438464367078349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7023034368, while the sum is 76.

The spelling of 438464367078349 in words is "four hundred thirty-eight trillion, four hundred sixty-four billion, three hundred sixty-seven million, seventy-eight thousand, three hundred forty-nine".