12532118517661 has 2 divisors, whose sum is σ = 12532118517662. Its totient is φ = 12532118517660.

The previous prime is 12532118517631. The next prime is 12532118517691. The reversal of 12532118517661 is 16671581123521.

It is a balanced prime because it is at equal distance from previous prime (12532118517631) and next prime (12532118517691).

It can be written as a sum of positive squares in only one way, i.e., 11809491012036 + 722627505625 = 3436494^2 + 850075^2 .

It is a cyclic number.

It is not a de Polignac number, because 12532118517661 - 2⁵ = 12532118517629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12532118517631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6266059258830 + 6266059258831.

It is an arithmetic number, because the mean of its divisors is an integer number (6266059258831).

Almost surely, 2^{12532118517661} is an apocalyptic number.

It is an amenable number.

12532118517661 is a deficient number, since it is larger than the sum of its proper divisors (1).

12532118517661 is an equidigital number, since it uses as much as digits as its factorization.

12532118517661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 604800, while the sum is 49.

The spelling of 12532118517661 in words is "twelve trillion, five hundred thirty-two billion, one hundred eighteen million, five hundred seventeen thousand, six hundred sixty-one".