163819201901 has 2 divisors, whose sum is σ = 163819201902. Its totient is φ = 163819201900.

The previous prime is 163819201877. The next prime is 163819201939. The reversal of 163819201901 is 109102918361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152372341801 + 11446860100 = 390349^2 + 106990^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163819201901 is a prime.

It is a super-2 number, since 2×163819201901² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163819201991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81909600950 + 81909600951.

It is an arithmetic number, because the mean of its divisors is an integer number (81909600951).

Almost surely, 2^163819201901 is an apocalyptic number.

It is an amenable number.

163819201901 is a deficient number, since it is larger than the sum of its proper divisors (1).

163819201901 is an equidigital number, since it uses as much as digits as its factorization.

163819201901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 41.

The spelling of 163819201901 in words is "one hundred sixty-three billion, eight hundred nineteen million, two hundred one thousand, nine hundred one".