1328136080861 has 8 divisors (see below), whose sum is σ = 1389768098904. Its totient is φ = 1267858612800.

The previous prime is 1328136080851. The next prime is 1328136080893. The reversal of 1328136080861 is 1680806318231.

It can be written as a sum of positive squares in 4 ways, for example, as 284295841636 + 1043840239225 = 533194^2 + 1021685^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1328136080861 - 2³⁸ = 1053258173917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328136080851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338635490 + ... + 338639411.

It is an arithmetic number, because the mean of its divisors is an integer number (173721012363).

Almost surely, 2^{1328136080861} is an apocalyptic number.

It is an amenable number.

1328136080861 is a deficient number, since it is larger than the sum of its proper divisors (61632018043).

1328136080861 is an equidigital number, since it uses as much as digits as its factorization.

1328136080861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677274991.

The product of its (nonzero) digits is 331776, while the sum is 47.

The spelling of 1328136080861 in words is "one trillion, three hundred twenty-eight billion, one hundred thirty-six million, eighty thousand, eight hundred sixty-one".