11955209945 has 16 divisors (see below), whose sum is σ = 16401934080. Its totient is φ = 8194749504.

The previous prime is 11955209941. The next prime is 11955209957. The reversal of 11955209945 is 54990255911.

It is a cyclic number.

It is not a de Polignac number, because 11955209945 - 2² = 11955209941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11955209893 and 11955209902.

It is not an unprimeable number, because it can be changed into a prime (11955209941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30836 + ... + 157674.

It is an arithmetic number, because the mean of its divisors is an integer number (1025120880).

Almost surely, 2^11955209945 is an apocalyptic number.

It is an amenable number.

11955209945 is a deficient number, since it is larger than the sum of its proper divisors (4446724135).

11955209945 is a wasteful number, since it uses less digits than its factorization.

11955209945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129544.

The product of its (nonzero) digits is 729000, while the sum is 50.

The spelling of 11955209945 in words is "eleven billion, nine hundred fifty-five million, two hundred nine thousand, nine hundred forty-five".