11981053769 has 2 divisors, whose sum is σ = 11981053770. Its totient is φ = 11981053768.

The previous prime is 11981053759. The next prime is 11981053781. The reversal of 11981053769 is 96735018911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11883834169 + 97219600 = 109013^2 + 9860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11981053769 is a prime.

It is a super-2 number, since 2×11981053769² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11981053759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5990526884 + 5990526885.

It is an arithmetic number, because the mean of its divisors is an integer number (5990526885).

Almost surely, 2^11981053769 is an apocalyptic number.

It is an amenable number.

11981053769 is a deficient number, since it is larger than the sum of its proper divisors (1).

11981053769 is an equidigital number, since it uses as much as digits as its factorization.

11981053769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 50.

The spelling of 11981053769 in words is "eleven billion, nine hundred eighty-one million, fifty-three thousand, seven hundred sixty-nine".