11955563201 has 2 divisors, whose sum is σ = 11955563202. Its totient is φ = 11955563200.

The previous prime is 11955563177. The next prime is 11955563209. The reversal of 11955563201 is 10236555911.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7186970176 + 4768593025 = 84776^2 + 69055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11955563201 is a prime.

It is not a weakly prime, because it can be changed into another prime (11955563209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5977781600 + 5977781601.

It is an arithmetic number, because the mean of its divisors is an integer number (5977781601).

Almost surely, 2^11955563201 is an apocalyptic number.

It is an amenable number.

11955563201 is a deficient number, since it is larger than the sum of its proper divisors (1).

11955563201 is an equidigital number, since it uses as much as digits as its factorization.

11955563201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40500, while the sum is 38.

The spelling of 11955563201 in words is "eleven billion, nine hundred fifty-five million, five hundred sixty-three thousand, two hundred one".