11624776561 has 2 divisors, whose sum is σ = 11624776562. Its totient is φ = 11624776560.

The previous prime is 11624776543. The next prime is 11624776607. The reversal of 11624776561 is 16567742611.

It is an a-pointer prime, because the next prime (11624776607) can be obtained adding 11624776561 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11531538225 + 93238336 = 107385^2 + 9656^2 .

It is a cyclic number.

It is not a de Polignac number, because 11624776561 - 2⁷ = 11624776433 is a prime.

It is not a weakly prime, because it can be changed into another prime (11624776531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5812388280 + 5812388281.

It is an arithmetic number, because the mean of its divisors is an integer number (5812388281).

Almost surely, 2^11624776561 is an apocalyptic number.

It is an amenable number.

11624776561 is a deficient number, since it is larger than the sum of its proper divisors (1).

11624776561 is an equidigital number, since it uses as much as digits as its factorization.

11624776561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 46.

The spelling of 11624776561 in words is "eleven billion, six hundred twenty-four million, seven hundred seventy-six thousand, five hundred sixty-one".