438148669417 has 2 divisors, whose sum is σ = 438148669418. Its totient is φ = 438148669416.

The previous prime is 438148669379. The next prime is 438148669451. The reversal of 438148669417 is 714966841834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 436420105641 + 1728563776 = 660621^2 + 41576^2 .

It is a cyclic number.

It is not a de Polignac number, because 438148669417 - 2³¹ = 436001185769 is a prime.

It is a super-2 number, since 2×438148669417² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (438148669477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219074334708 + 219074334709.

It is an arithmetic number, because the mean of its divisors is an integer number (219074334709).

Almost surely, 2^438148669417 is an apocalyptic number.

It is an amenable number.

438148669417 is a deficient number, since it is larger than the sum of its proper divisors (1).

438148669417 is an equidigital number, since it uses as much as digits as its factorization.

438148669417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27869184, while the sum is 61.

The spelling of 438148669417 in words is "four hundred thirty-eight billion, one hundred forty-eight million, six hundred sixty-nine thousand, four hundred seventeen".