11955811873 has 2 divisors, whose sum is σ = 11955811874. Its totient is φ = 11955811872.

The previous prime is 11955811771. The next prime is 11955811913. The reversal of 11955811873 is 37811855911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6465446464 + 5490365409 = 80408^2 + 74097^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11955811873 is a prime.

It is not a weakly prime, because it can be changed into another prime (11955611873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5977905936 + 5977905937.

It is an arithmetic number, because the mean of its divisors is an integer number (5977905937).

Almost surely, 2^11955811873 is an apocalyptic number.

It is an amenable number.

11955811873 is a deficient number, since it is larger than the sum of its proper divisors (1).

11955811873 is an equidigital number, since it uses as much as digits as its factorization.

11955811873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 49.

The spelling of 11955811873 in words is "eleven billion, nine hundred fifty-five million, eight hundred eleven thousand, eight hundred seventy-three".