163595980861 has 2 divisors, whose sum is σ = 163595980862. Its totient is φ = 163595980860.

The previous prime is 163595980837. The next prime is 163595980901. The reversal of 163595980861 is 168089595361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163544212836 + 51768025 = 404406^2 + 7195^2 .

It is a cyclic number.

It is not a de Polignac number, because 163595980861 - 2¹¹ = 163595978813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 163595980861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163595780861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81797990430 + 81797990431.

It is an arithmetic number, because the mean of its divisors is an integer number (81797990431).

Almost surely, 2^163595980861 is an apocalyptic number.

It is an amenable number.

163595980861 is a deficient number, since it is larger than the sum of its proper divisors (1).

163595980861 is an equidigital number, since it uses as much as digits as its factorization.

163595980861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13996800, while the sum is 61.

The spelling of 163595980861 in words is "one hundred sixty-three billion, five hundred ninety-five million, nine hundred eighty thousand, eight hundred sixty-one".