11965391285 has 8 divisors (see below), whose sum is σ = 14359123800. Its totient is φ = 9571876864.

The previous prime is 11965391267. The next prime is 11965391323. The reversal of 11965391285 is 58219356911.

It can be written as a sum of positive squares in 4 ways, for example, as 88096996 + 11877294289 = 9386^2 + 108983^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11965391285 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112949 + ... + 191541.

It is an arithmetic number, because the mean of its divisors is an integer number (1794890475).

Almost surely, 2^11965391285 is an apocalyptic number.

It is an amenable number.

11965391285 is a deficient number, since it is larger than the sum of its proper divisors (2393732515).

11965391285 is an equidigital number, since it uses as much as digits as its factorization.

11965391285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109047.

The product of its digits is 583200, while the sum is 50.

The spelling of 11965391285 in words is "eleven billion, nine hundred sixty-five million, three hundred ninety-one thousand, two hundred eighty-five".