11867626409 has 2 divisors, whose sum is σ = 11867626410. Its totient is φ = 11867626408.

The previous prime is 11867626399. The next prime is 11867626439. The reversal of 11867626409 is 90462676811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7268074009 + 4599552400 = 85253^2 + 67820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11867626409 is a prime.

It is not a weakly prime, because it can be changed into another prime (11867626439) 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, 5933813204 + 5933813205.

It is an arithmetic number, because the mean of its divisors is an integer number (5933813205).

Almost surely, 2^11867626409 is an apocalyptic number.

It is an amenable number.

11867626409 is a deficient number, since it is larger than the sum of its proper divisors (1).

11867626409 is an equidigital number, since it uses as much as digits as its factorization.

11867626409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 11867626409 in words is "eleven billion, eight hundred sixty-seven million, six hundred twenty-six thousand, four hundred nine".