163944248833 has 2 divisors, whose sum is σ = 163944248834. Its totient is φ = 163944248832.

The previous prime is 163944248803. The next prime is 163944248843. The reversal of 163944248833 is 338842449361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112102423489 + 51841825344 = 334817^2 + 227688^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163944248833 is a prime.

It is not a weakly prime, because it can be changed into another prime (163944248803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81972124416 + 81972124417.

It is an arithmetic number, because the mean of its divisors is an integer number (81972124417).

Almost surely, 2^163944248833 is an apocalyptic number.

It is an amenable number.

163944248833 is a deficient number, since it is larger than the sum of its proper divisors (1).

163944248833 is an equidigital number, since it uses as much as digits as its factorization.

163944248833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11943936, while the sum is 55.

The spelling of 163944248833 in words is "one hundred sixty-three billion, nine hundred forty-four million, two hundred forty-eight thousand, eight hundred thirty-three".