13624601561 has 2 divisors, whose sum is σ = 13624601562. Its totient is φ = 13624601560.

The previous prime is 13624601537. The next prime is 13624601603. The reversal of 13624601561 is 16510642631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13399451536 + 225150025 = 115756^2 + 15005^2 .

It is a cyclic number.

It is not a de Polignac number, because 13624601561 - 2¹⁰ = 13624600537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13624601461) 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, 6812300780 + 6812300781.

It is an arithmetic number, because the mean of its divisors is an integer number (6812300781).

Almost surely, 2^13624601561 is an apocalyptic number.

It is an amenable number.

13624601561 is a deficient number, since it is larger than the sum of its proper divisors (1).

13624601561 is an equidigital number, since it uses as much as digits as its factorization.

13624601561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 13624601561 in words is "thirteen billion, six hundred twenty-four million, six hundred one thousand, five hundred sixty-one".