163138705346 has 4 divisors (see below), whose sum is σ = 244708058022. Its totient is φ = 81569352672.

The previous prime is 163138705343. The next prime is 163138705349. The reversal of 163138705346 is 643507831361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 643507831361 = 7043 ⋅91368427.

It is an interprime number because it is at equal distance from previous prime (163138705343) and next prime (163138705349).

It can be written as a sum of positive squares in only one way, i.e., 130096554721 + 33042150625 = 360689^2 + 181775^2 .

It is a super-2 number, since 2×163138705346² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 163138705346.

It is not an unprimeable number, because it can be changed into a prime (163138705343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40784676335 + ... + 40784676338.

Almost surely, 2^163138705346 is an apocalyptic number.

163138705346 is a deficient number, since it is larger than the sum of its proper divisors (81569352676).

163138705346 is an equidigital number, since it uses as much as digits as its factorization.

163138705346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81569352675.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 163138705346 in words is "one hundred sixty-three billion, one hundred thirty-eight million, seven hundred five thousand, three hundred forty-six".