11965035891859 has 4 divisors (see below), whose sum is σ = 11965043260600. Its totient is φ = 11965028523120.

The previous prime is 11965035891839. The next prime is 11965035891871. The reversal of 11965035891859 is 95819853056911.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11965035891859 - 2²³ = 11965027503251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11965035891829) 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, 60834 + ... + 4892215.

It is an arithmetic number, because the mean of its divisors is an integer number (2991260815150).

Almost surely, 2^{11965035891859} is an apocalyptic number.

11965035891859 is a deficient number, since it is larger than the sum of its proper divisors (7368741).

11965035891859 is an equidigital number, since it uses as much as digits as its factorization.

11965035891859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7368740.

The product of its (nonzero) digits is 104976000, while the sum is 70.

The spelling of 11965035891859 in words is "eleven trillion, nine hundred sixty-five billion, thirty-five million, eight hundred ninety-one thousand, eight hundred fifty-nine".