163812388213 has 4 divisors (see below), whose sum is σ = 163813359820. Its totient is φ = 163811416608.

The previous prime is 163812388183. The next prime is 163812388219. The reversal of 163812388213 is 312883218361.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 16922627569 + 146889760644 = 130087^2 + 383262^2 .

It is a cyclic number.

It is not a de Polignac number, because 163812388213 - 2¹³ = 163812380021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163812388219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160128 + ... + 594361.

It is an arithmetic number, because the mean of its divisors is an integer number (40953339955).

Almost surely, 2^163812388213 is an apocalyptic number.

It is an amenable number.

163812388213 is a deficient number, since it is larger than the sum of its proper divisors (971607).

163812388213 is an equidigital number, since it uses as much as digits as its factorization.

163812388213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971606.

The product of its digits is 331776, while the sum is 46.

The spelling of 163812388213 in words is "one hundred sixty-three billion, eight hundred twelve million, three hundred eighty-eight thousand, two hundred thirteen".