11952405869 has 2 divisors, whose sum is σ = 11952405870. Its totient is φ = 11952405868.

The previous prime is 11952405853. The next prime is 11952405901. The reversal of 11952405869 is 96850425911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11225402500 + 727003369 = 105950^2 + 26963^2 .

It is a cyclic number.

It is not a de Polignac number, because 11952405869 - 2⁴ = 11952405853 is a prime.

It is a super-2 number, since 2×11952405869² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11952401869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5976202934 + 5976202935.

It is an arithmetic number, because the mean of its divisors is an integer number (5976202935).

Almost surely, 2^11952405869 is an apocalyptic number.

It is an amenable number.

11952405869 is a deficient number, since it is larger than the sum of its proper divisors (1).

11952405869 is an equidigital number, since it uses as much as digits as its factorization.

11952405869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 777600, while the sum is 50.

The spelling of 11952405869 in words is "eleven billion, nine hundred fifty-two million, four hundred five thousand, eight hundred sixty-nine".