11965687141 has 4 divisors (see below), whose sum is σ = 12485934432. Its totient is φ = 11445439852.

The previous prime is 11965687127. The next prime is 11965687169. The reversal of 11965687141 is 14178656911.

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 a de Polignac number, because none of the positive numbers 2^k-11965687141 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 (11965687121) 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, 260123611 + ... + 260123656.

It is an arithmetic number, because the mean of its divisors is an integer number (3121483608).

Almost surely, 2^11965687141 is an apocalyptic number.

It is an amenable number.

11965687141 is a deficient number, since it is larger than the sum of its proper divisors (520247291).

11965687141 is an equidigital number, since it uses as much as digits as its factorization.

11965687141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520247290.

The product of its digits is 362880, while the sum is 49.

The spelling of 11965687141 in words is "eleven billion, nine hundred sixty-five million, six hundred eighty-seven thousand, one hundred forty-one".