163606254662551 has 2 divisors, whose sum is σ = 163606254662552. Its totient is φ = 163606254662550.

The previous prime is 163606254662491. The next prime is 163606254662573. The reversal of 163606254662551 is 155266452606361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 163606254662551 - 2¹¹ = 163606254660503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163606254662251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81803127331275 + 81803127331276.

It is an arithmetic number, because the mean of its divisors is an integer number (81803127331276).

Almost surely, 2^{163606254662551} is an apocalyptic number.

163606254662551 is a deficient number, since it is larger than the sum of its proper divisors (1).

163606254662551 is an equidigital number, since it uses as much as digits as its factorization.

163606254662551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656000, while the sum is 58.

The spelling of 163606254662551 in words is "one hundred sixty-three trillion, six hundred six billion, two hundred fifty-four million, six hundred sixty-two thousand, five hundred fifty-one".