163643506012213 has 8 divisors (see below), whose sum is σ = 165906268596248. Its totient is φ = 161381312907264.

The previous prime is 163643506012211. The next prime is 163643506012241. The reversal of 163643506012213 is 312210605346361.

It can be written as a sum of positive squares in 4 ways, for example, as 1627826394769 + 162015679617444 = 1275863^2 + 12728538^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163643506012213 - 2¹ = 163643506012211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163643506012213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163643506012211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141791070 + ... + 142940527.

It is an arithmetic number, because the mean of its divisors is an integer number (20738283574531).

Almost surely, 2^{163643506012213} is an apocalyptic number.

It is an amenable number.

163643506012213 is a deficient number, since it is larger than the sum of its proper divisors (2262762584035).

163643506012213 is an equidigital number, since it uses as much as digits as its factorization.

163643506012213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284739543.

The product of its (nonzero) digits is 466560, while the sum is 43.

The spelling of 163643506012213 in words is "one hundred sixty-three trillion, six hundred forty-three billion, five hundred six million, twelve thousand, two hundred thirteen".