11984769961 has 2 divisors, whose sum is σ = 11984769962. Its totient is φ = 11984769960.

The previous prime is 11984769947. The next prime is 11984769997. The reversal of 11984769961 is 16996748911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11525310736 + 459459225 = 107356^2 + 21435^2 .

It is a cyclic number.

It is not a de Polignac number, because 11984769961 - 2¹¹ = 11984767913 is a prime.

It is a super-2 number, since 2×11984769961² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11984769961.

It is not a weakly prime, because it can be changed into another prime (11984769161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5992384980 + 5992384981.

It is an arithmetic number, because the mean of its divisors is an integer number (5992384981).

Almost surely, 2^11984769961 is an apocalyptic number.

It is an amenable number.

11984769961 is a deficient number, since it is larger than the sum of its proper divisors (1).

11984769961 is an equidigital number, since it uses as much as digits as its factorization.

11984769961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 61.

The spelling of 11984769961 in words is "eleven billion, nine hundred eighty-four million, seven hundred sixty-nine thousand, nine hundred sixty-one".