11685142349 has 2 divisors, whose sum is σ = 11685142350. Its totient is φ = 11685142348.

The previous prime is 11685142333. The next prime is 11685142361. The reversal of 11685142349 is 94324158611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11118226249 + 566916100 = 105443^2 + 23810^2 .

It is an emirp because it is prime and its reverse (94324158611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11685142349 - 2⁴ = 11685142333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11685142319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5842571174 + 5842571175.

It is an arithmetic number, because the mean of its divisors is an integer number (5842571175).

Almost surely, 2^11685142349 is an apocalyptic number.

It is an amenable number.

11685142349 is a deficient number, since it is larger than the sum of its proper divisors (1).

11685142349 is an equidigital number, since it uses as much as digits as its factorization.

11685142349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 44.

The spelling of 11685142349 in words is "eleven billion, six hundred eighty-five million, one hundred forty-two thousand, three hundred forty-nine".