163020558061 has 2 divisors, whose sum is σ = 163020558062. Its totient is φ = 163020558060.

The previous prime is 163020558023. The next prime is 163020558089. The reversal of 163020558061 is 160855020361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109240165225 + 53780392836 = 330515^2 + 231906^2 .

It is a cyclic number.

It is not a de Polignac number, because 163020558061 - 2⁷ = 163020557933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 163020558061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163020559061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81510279030 + 81510279031.

It is an arithmetic number, because the mean of its divisors is an integer number (81510279031).

Almost surely, 2^163020558061 is an apocalyptic number.

It is an amenable number.

163020558061 is a deficient number, since it is larger than the sum of its proper divisors (1).

163020558061 is an equidigital number, since it uses as much as digits as its factorization.

163020558061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 163020558061 in words is "one hundred sixty-three billion, twenty million, five hundred fifty-eight thousand, sixty-one".