163378258 has 4 divisors (see below), whose sum is σ = 245067390. Its totient is φ = 81689128.

The previous prime is 163378219. The next prime is 163378309. The reversal of 163378258 is 852873361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 852873361 = 137 ⋅6225353.

It can be written as a sum of positive squares in only one way, i.e., 102272769 + 61105489 = 10113^2 + 7817^2 .

It is a super-2 number, since 2×163378258² = 53384910374229128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40844563 + ... + 40844566.

Almost surely, 2^163378258 is an apocalyptic number.

163378258 is a deficient number, since it is larger than the sum of its proper divisors (81689132).

163378258 is an equidigital number, since it uses as much as digits as its factorization.

163378258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81689131.

The product of its digits is 241920, while the sum is 43.

The square root of 163378258 is about 12781.9504771377. The cubic root of 163378258 is about 546.6777777998.

The spelling of 163378258 in words is "one hundred sixty-three million, three hundred seventy-eight thousand, two hundred fifty-eight".