11421776749 has 2 divisors, whose sum is σ = 11421776750. Its totient is φ = 11421776748.

The previous prime is 11421776711. The next prime is 11421776833. The reversal of 11421776749 is 94767712411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11158753225 + 263023524 = 105635^2 + 16218^2 .

It is a cyclic number.

It is not a de Polignac number, because 11421776749 - 2²⁵ = 11388222317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11421776449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5710888374 + 5710888375.

It is an arithmetic number, because the mean of its divisors is an integer number (5710888375).

Almost surely, 2^11421776749 is an apocalyptic number.

It is an amenable number.

11421776749 is a deficient number, since it is larger than the sum of its proper divisors (1).

11421776749 is an equidigital number, since it uses as much as digits as its factorization.

11421776749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 592704, while the sum is 49.

The spelling of 11421776749 in words is "eleven billion, four hundred twenty-one million, seven hundred seventy-six thousand, seven hundred forty-nine".