11805715349 has 2 divisors, whose sum is σ = 11805715350. Its totient is φ = 11805715348.

The previous prime is 11805715309. The next prime is 11805715373. The reversal of 11805715349 is 94351750811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10897898449 + 907816900 = 104393^2 + 30130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11805715349 is a prime.

It is a super-2 number, since 2×11805715349² (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 (11805715309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5902857674 + 5902857675.

It is an arithmetic number, because the mean of its divisors is an integer number (5902857675).

Almost surely, 2^11805715349 is an apocalyptic number.

It is an amenable number.

11805715349 is a deficient number, since it is larger than the sum of its proper divisors (1).

11805715349 is an equidigital number, since it uses as much as digits as its factorization.

11805715349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 44.

The spelling of 11805715349 in words is "eleven billion, eight hundred five million, seven hundred fifteen thousand, three hundred forty-nine".