163056778 has 4 divisors (see below), whose sum is σ = 244585170. Its totient is φ = 81528388.

The previous prime is 163056769. The next prime is 163056781. The reversal of 163056778 is 877650361.

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., 134722449 + 28334329 = 11607^2 + 5323^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40764193 + ... + 40764196.

Almost surely, 2^163056778 is an apocalyptic number.

163056778 is a deficient number, since it is larger than the sum of its proper divisors (81528392).

163056778 is an equidigital number, since it uses as much as digits as its factorization.

163056778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81528391.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 163056778 is about 12769.3687392917. The cubic root of 163056778 is about 546.3189757325.

The spelling of 163056778 in words is "one hundred sixty-three million, fifty-six thousand, seven hundred seventy-eight".