163813738 has 8 divisors (see below), whose sum is σ = 268058880. Its totient is φ = 74460780.

The previous prime is 163813733. The next prime is 163813739. The reversal of 163813738 is 837318361.

163813738 = T₅₄₅₂ + T₅₄₅₃ + ... + T₅₄₆₂.

163813738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 163813738.

It is not an unprimeable number, because it can be changed into a prime (163813733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3723018 + ... + 3723061.

It is an arithmetic number, because the mean of its divisors is an integer number (33507360).

Almost surely, 2^163813738 is an apocalyptic number.

163813738 is a deficient number, since it is larger than the sum of its proper divisors (104245142).

163813738 is a wasteful number, since it uses less digits than its factorization.

163813738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7446092.

The product of its digits is 72576, while the sum is 40.

The square root of 163813738 is about 12798.9740995128. The cubic root of 163813738 is about 547.1630647934.

It can be divided in two parts, 1638 and 13738, that added together give a square (15376 = 124²).

The spelling of 163813738 in words is "one hundred sixty-three million, eight hundred thirteen thousand, seven hundred thirty-eight".