1339661097805 has 4 divisors (see below), whose sum is σ = 1607593317372. Its totient is φ = 1071728878240.

The previous prime is 1339661097781. The next prime is 1339661097821. The reversal of 1339661097805 is 5087901669331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 218302938441 + 1121358159364 = 467229^2 + 1058942^2 .

It is not a de Polignac number, because 1339661097805 - 2¹¹ = 1339661095757 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1339661097805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133966109776 + ... + 133966109785.

It is an arithmetic number, because the mean of its divisors is an integer number (401898329343).

Almost surely, 2^{1339661097805} is an apocalyptic number.

It is an amenable number.

1339661097805 is a deficient number, since it is larger than the sum of its proper divisors (267932219567).

1339661097805 is an equidigital number, since it uses as much as digits as its factorization.

1339661097805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267932219566.

The product of its (nonzero) digits is 7348320, while the sum is 58.

The spelling of 1339661097805 in words is "one trillion, three hundred thirty-nine billion, six hundred sixty-one million, ninety-seven thousand, eight hundred five".