163606513522 has 4 divisors (see below), whose sum is σ = 245409770286. Its totient is φ = 81803256760.

The previous prime is 163606513513. The next prime is 163606513591. The reversal of 163606513522 is 225315606361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 225315606361 = 259397 ⋅868613.

It can be written as a sum of positive squares in only one way, i.e., 159735309561 + 3871203961 = 399669^2 + 62219^2 .

It is a super-3 number, since 3×163606513522³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40901628379 + ... + 40901628382.

Almost surely, 2^163606513522 is an apocalyptic number.

163606513522 is a deficient number, since it is larger than the sum of its proper divisors (81803256764).

163606513522 is an equidigital number, since it uses as much as digits as its factorization.

163606513522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81803256763.

The product of its (nonzero) digits is 194400, while the sum is 40.

The spelling of 163606513522 in words is "one hundred sixty-three billion, six hundred six million, five hundred thirteen thousand, five hundred twenty-two".