163370573081 has 2 divisors, whose sum is σ = 163370573082. Its totient is φ = 163370573080.

The previous prime is 163370573071. The next prime is 163370573083. The reversal of 163370573081 is 180375073361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160672705600 + 2697867481 = 400840^2 + 51941^2 .

It is a cyclic number.

It is not a de Polignac number, because 163370573081 - 2¹⁴ = 163370556697 is a prime.

It is a super-2 number, since 2×163370573081² (a number of 23 digits) contains 22 as substring.

Together with 163370573083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (163370573083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81685286540 + 81685286541.

It is an arithmetic number, because the mean of its divisors is an integer number (81685286541).

Almost surely, 2^163370573081 is an apocalyptic number.

It is an amenable number.

163370573081 is a deficient number, since it is larger than the sum of its proper divisors (1).

163370573081 is an equidigital number, since it uses as much as digits as its factorization.

163370573081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 163370573081 in words is "one hundred sixty-three billion, three hundred seventy million, five hundred seventy-three thousand, eighty-one".