438146621279 has 2 divisors, whose sum is σ = 438146621280. Its totient is φ = 438146621278.

The previous prime is 438146621261. The next prime is 438146621281. The reversal of 438146621279 is 972126641834.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438146621279 is a prime.

Together with 438146621281, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 438146621279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438146621219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219073310639 + 219073310640.

It is an arithmetic number, because the mean of its divisors is an integer number (219073310640).

Almost surely, 2^438146621279 is an apocalyptic number.

438146621279 is a deficient number, since it is larger than the sum of its proper divisors (1).

438146621279 is an equidigital number, since it uses as much as digits as its factorization.

438146621279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 53.

The spelling of 438146621279 in words is "four hundred thirty-eight billion, one hundred forty-six million, six hundred twenty-one thousand, two hundred seventy-nine".