163866451201 has 4 divisors (see below), whose sum is σ = 163870759492. Its totient is φ = 163862142912.

The previous prime is 163866451181. The next prime is 163866451241. The reversal of 163866451201 is 102154668361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102154668361 = 7907 ⋅12919523.

It can be written as a sum of positive squares in 2 ways, for example, as 29833580176 + 134032871025 = 172724^2 + 366105^2 .

It is a cyclic number.

It is not a de Polignac number, because 163866451201 - 2¹³ = 163866443009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163866451241) 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 in 3 ways as a sum of consecutive naturals, for example, 2096580 + ... + 2173333.

It is an arithmetic number, because the mean of its divisors is an integer number (40967689873).

Almost surely, 2^163866451201 is an apocalyptic number.

It is an amenable number.

163866451201 is a deficient number, since it is larger than the sum of its proper divisors (4308291).

163866451201 is an equidigital number, since it uses as much as digits as its factorization.

163866451201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4308290.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 163866451201 in words is "one hundred sixty-three billion, eight hundred sixty-six million, four hundred fifty-one thousand, two hundred one".