438782660417 has 2 divisors, whose sum is σ = 438782660418. Its totient is φ = 438782660416.

The previous prime is 438782660411. The next prime is 438782660483. The reversal of 438782660417 is 714066287834.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 435717487921 + 3065172496 = 660089^2 + 55364^2 .

It is a cyclic number.

It is not a de Polignac number, because 438782660417 - 2¹⁴ = 438782644033 is a prime.

It is a super-2 number, since 2×438782660417² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (438782660411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219391330208 + 219391330209.

It is an arithmetic number, because the mean of its divisors is an integer number (219391330209).

Almost surely, 2^438782660417 is an apocalyptic number.

It is an amenable number.

438782660417 is a deficient number, since it is larger than the sum of its proper divisors (1).

438782660417 is an equidigital number, since it uses as much as digits as its factorization.

438782660417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10838016, while the sum is 56.

The spelling of 438782660417 in words is "four hundred thirty-eight billion, seven hundred eighty-two million, six hundred sixty thousand, four hundred seventeen".