163812638 has 16 divisors (see below), whose sum is σ = 269668224. Its totient is φ = 74012760.

The previous prime is 163812617. The next prime is 163812643. The reversal of 163812638 is 836218361.

163812638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18620 + ... + 25967.

It is an arithmetic number, because the mean of its divisors is an integer number (16854264).

Almost surely, 2^163812638 is an apocalyptic number.

163812638 is a deficient number, since it is larger than the sum of its proper divisors (105855586).

163812638 is a wasteful number, since it uses less digits than its factorization.

163812638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44767.

The product of its digits is 41472, while the sum is 38.

The square root of 163812638 is about 12798.9311272465. The cubic root of 163812638 is about 547.1618400676.

The spelling of 163812638 in words is "one hundred sixty-three million, eight hundred twelve thousand, six hundred thirty-eight".