1328711511709 has 4 divisors (see below), whose sum is σ = 1328744536416. Its totient is φ = 1328678487004.

The previous prime is 1328711511707. The next prime is 1328711511749. The reversal of 1328711511709 is 9071151178231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1328711511709 - 2¹ = 1328711511707 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328711511707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16451929 + ... + 16532494.

It is an arithmetic number, because the mean of its divisors is an integer number (332186134104).

Almost surely, 2^{1328711511709} is an apocalyptic number.

It is an amenable number.

1328711511709 is a deficient number, since it is larger than the sum of its proper divisors (33024707).

1328711511709 is an equidigital number, since it uses as much as digits as its factorization.

1328711511709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33024706.

The product of its (nonzero) digits is 105840, while the sum is 46.

The spelling of 1328711511709 in words is "one trillion, three hundred twenty-eight billion, seven hundred eleven million, five hundred eleven thousand, seven hundred nine".