163203853852538 has 4 divisors (see below), whose sum is σ = 244805780778810. Its totient is φ = 81601926926268.

The previous prime is 163203853852453. The next prime is 163203853852573. The reversal of 163203853852538 is 835258358302361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 129014772590089 + 34189081262449 = 11358467^2 + 5847143^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40800963463133 + ... + 40800963463136.

Almost surely, 2^{163203853852538} is an apocalyptic number.

163203853852538 is a deficient number, since it is larger than the sum of its proper divisors (81601926926272).

163203853852538 is an equidigital number, since it uses as much as digits as its factorization.

163203853852538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81601926926271.

The product of its (nonzero) digits is 124416000, while the sum is 62.

The spelling of 163203853852538 in words is "one hundred sixty-three trillion, two hundred three billion, eight hundred fifty-three million, eight hundred fifty-two thousand, five hundred thirty-eight".