11969374561 has 2 divisors, whose sum is σ = 11969374562. Its totient is φ = 11969374560.

The previous prime is 11969374553. The next prime is 11969374579. The reversal of 11969374561 is 16547396911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10318496400 + 1650878161 = 101580^2 + 40631^2 .

It is an emirp because it is prime and its reverse (16547396911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11969374561 - 2³ = 11969374553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11969374499 and 11969374508.

It is not a weakly prime, because it can be changed into another prime (11969374591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5984687280 + 5984687281.

It is an arithmetic number, because the mean of its divisors is an integer number (5984687281).

Almost surely, 2^11969374561 is an apocalyptic number.

It is an amenable number.

11969374561 is a deficient number, since it is larger than the sum of its proper divisors (1).

11969374561 is an equidigital number, since it uses as much as digits as its factorization.

11969374561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 52.

The spelling of 11969374561 in words is "eleven billion, nine hundred sixty-nine million, three hundred seventy-four thousand, five hundred sixty-one".