20116761642529 has 2 divisors, whose sum is σ = 20116761642530. Its totient is φ = 20116761642528.

The previous prime is 20116761642493. The next prime is 20116761642553. The reversal of 20116761642529 is 92524616761102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19218535371025 + 898226271504 = 4383895^2 + 947748^2 .

It is a cyclic number.

It is not a de Polignac number, because 20116761642529 - 2⁷ = 20116761642401 is a prime.

It is not a weakly prime, because it can be changed into another prime (20116761642589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10058380821264 + 10058380821265.

It is an arithmetic number, because the mean of its divisors is an integer number (10058380821265).

Almost surely, 2^{20116761642529} is an apocalyptic number.

It is an amenable number.

20116761642529 is a deficient number, since it is larger than the sum of its proper divisors (1).

20116761642529 is an equidigital number, since it uses as much as digits as its factorization.

20116761642529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 20116761642529 in words is "twenty trillion, one hundred sixteen billion, seven hundred sixty-one million, six hundred forty-two thousand, five hundred twenty-nine".