163505067457 has 2 divisors, whose sum is σ = 163505067458. Its totient is φ = 163505067456.

The previous prime is 163505067443. The next prime is 163505067493. The reversal of 163505067457 is 754760505361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147152028816 + 16353038641 = 383604^2 + 127879^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163505067457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 163505067457.

It is not a weakly prime, because it can be changed into another prime (163505067497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81752533728 + 81752533729.

It is an arithmetic number, because the mean of its divisors is an integer number (81752533729).

Almost surely, 2^163505067457 is an apocalyptic number.

It is an amenable number.

163505067457 is a deficient number, since it is larger than the sum of its proper divisors (1).

163505067457 is an equidigital number, since it uses as much as digits as its factorization.

163505067457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2646000, while the sum is 49.

The spelling of 163505067457 in words is "one hundred sixty-three billion, five hundred five million, sixty-seven thousand, four hundred fifty-seven".