1326639880831 has 4 divisors (see below), whose sum is σ = 1349125302600. Its totient is φ = 1304154459064.

The previous prime is 1326639880801. The next prime is 1326639880927. The reversal of 1326639880831 is 1380889366231.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1326639880831 is a prime.

It is a super-2 number, since 2×1326639880831² (a number of 25 digits) contains 22 as substring.

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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326639880801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11242710796 + ... + 11242710913.

It is an arithmetic number, because the mean of its divisors is an integer number (337281325650).

Almost surely, 2^{1326639880831} is an apocalyptic number.

1326639880831 is a deficient number, since it is larger than the sum of its proper divisors (22485421769).

1326639880831 is an equidigital number, since it uses as much as digits as its factorization.

1326639880831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22485421768.

The product of its (nonzero) digits is 8957952, while the sum is 58.

The spelling of 1326639880831 in words is "one trillion, three hundred twenty-six billion, six hundred thirty-nine million, eight hundred eighty thousand, eight hundred thirty-one".