11956901633 has 2 divisors, whose sum is σ = 11956901634. Its totient is φ = 11956901632.

The previous prime is 11956901623. The next prime is 11956901653. The reversal of 11956901633 is 33610965911.

It is a happy number.

11956901633 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10205646529 + 1751255104 = 101023^2 + 41848^2 .

It is a cyclic number.

It is not a de Polignac number, because 11956901633 - 2⁴ = 11956901617 is a prime.

It is a super-2 number, since 2×11956901633² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11956901623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5978450816 + 5978450817.

It is an arithmetic number, because the mean of its divisors is an integer number (5978450817).

Almost surely, 2^11956901633 is an apocalyptic number.

It is an amenable number.

11956901633 is a deficient number, since it is larger than the sum of its proper divisors (1).

11956901633 is an equidigital number, since it uses as much as digits as its factorization.

11956901633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 131220, while the sum is 44.

The spelling of 11956901633 in words is "eleven billion, nine hundred fifty-six million, nine hundred one thousand, six hundred thirty-three".