11785436231 has 2 divisors, whose sum is σ = 11785436232. Its totient is φ = 11785436230.

The previous prime is 11785436227. The next prime is 11785436239. The reversal of 11785436231 is 13263458711.

It is a weak prime.

It is an emirp because it is prime and its reverse (13263458711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11785436231 - 2² = 11785436227 is a prime.

It is a super-2 number, since 2×11785436231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11785436239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5892718115 + 5892718116.

It is an arithmetic number, because the mean of its divisors is an integer number (5892718116).

Almost surely, 2^11785436231 is an apocalyptic number.

11785436231 is a deficient number, since it is larger than the sum of its proper divisors (1).

11785436231 is an equidigital number, since it uses as much as digits as its factorization.

11785436231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The spelling of 11785436231 in words is "eleven billion, seven hundred eighty-five million, four hundred thirty-six thousand, two hundred thirty-one".