1386326128849 has 2 divisors, whose sum is σ = 1386326128850. Its totient is φ = 1386326128848.

The previous prime is 1386326128823. The next prime is 1386326128877. The reversal of 1386326128849 is 9488216236831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1362663998224 + 23662130625 = 1167332^2 + 153825^2 .

It is a cyclic number.

It is not a de Polignac number, because 1386326128849 - 2¹⁵ = 1386326096081 is a prime.

It is not a weakly prime, because it can be changed into another prime (1386326138849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693163064424 + 693163064425.

It is an arithmetic number, because the mean of its divisors is an integer number (693163064425).

Almost surely, 2^{1386326128849} is an apocalyptic number.

It is an amenable number.

1386326128849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1386326128849 is an equidigital number, since it uses as much as digits as its factorization.

1386326128849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23887872, while the sum is 61.

The spelling of 1386326128849 in words is "one trillion, three hundred eighty-six billion, three hundred twenty-six million, one hundred twenty-eight thousand, eight hundred forty-nine".