12351626561 has 2 divisors, whose sum is σ = 12351626562. Its totient is φ = 12351626560.

The previous prime is 12351626549. The next prime is 12351626579. The reversal of 12351626561 is 16562615321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12258696961 + 92929600 = 110719^2 + 9640^2 .

It is a cyclic number.

It is not a de Polignac number, because 12351626561 - 2¹⁰ = 12351625537 is a prime.

It is not a weakly prime, because it can be changed into another prime (12351626531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6175813280 + 6175813281.

It is an arithmetic number, because the mean of its divisors is an integer number (6175813281).

Almost surely, 2^12351626561 is an apocalyptic number.

It is an amenable number.

12351626561 is a deficient number, since it is larger than the sum of its proper divisors (1).

12351626561 is an equidigital number, since it uses as much as digits as its factorization.

12351626561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 38.

The spelling of 12351626561 in words is "twelve billion, three hundred fifty-one million, six hundred twenty-six thousand, five hundred sixty-one".