438044166137 has 2 divisors, whose sum is σ = 438044166138. Its totient is φ = 438044166136.

The previous prime is 438044166097. The next prime is 438044166199. The reversal of 438044166137 is 731661440834.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 391752061801 + 46292104336 = 625901^2 + 215156^2 .

It is a cyclic number.

It is not a de Polignac number, because 438044166137 - 2²² = 438039971833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 438044166091 and 438044166100.

It is not a weakly prime, because it can be changed into another prime (438044160137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219022083068 + 219022083069.

It is an arithmetic number, because the mean of its divisors is an integer number (219022083069).

Almost surely, 2^438044166137 is an apocalyptic number.

It is an amenable number.

438044166137 is a deficient number, since it is larger than the sum of its proper divisors (1).

438044166137 is an equidigital number, since it uses as much as digits as its factorization.

438044166137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 47.

The spelling of 438044166137 in words is "four hundred thirty-eight billion, forty-four million, one hundred sixty-six thousand, one hundred thirty-seven".