11994881749 has 2 divisors, whose sum is σ = 11994881750. Its totient is φ = 11994881748.

The previous prime is 11994881737. The next prime is 11994881771. The reversal of 11994881749 is 94718849911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9883938724 + 2110943025 = 99418^2 + 45945^2 .

It is a cyclic number.

It is not a de Polignac number, because 11994881749 - 2²¹ = 11992784597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11994881449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5997440874 + 5997440875.

It is an arithmetic number, because the mean of its divisors is an integer number (5997440875).

Almost surely, 2^11994881749 is an apocalyptic number.

It is an amenable number.

11994881749 is a deficient number, since it is larger than the sum of its proper divisors (1).

11994881749 is an equidigital number, since it uses as much as digits as its factorization.

11994881749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5225472, while the sum is 61.

The spelling of 11994881749 in words is "eleven billion, nine hundred ninety-four million, eight hundred eighty-one thousand, seven hundred forty-nine".