163313378 has 4 divisors (see below), whose sum is σ = 244970070. Its totient is φ = 81656688.

The previous prime is 163313347. The next prime is 163313389. The reversal of 163313378 is 873313361.

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., 143448529 + 19864849 = 11977^2 + 4457^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40828343 + ... + 40828346.

Almost surely, 2^163313378 is an apocalyptic number.

163313378 is a deficient number, since it is larger than the sum of its proper divisors (81656692).

163313378 is an equidigital number, since it uses as much as digits as its factorization.

163313378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81656691.

The product of its digits is 27216, while the sum is 35.

The square root of 163313378 is about 12779.4122713058. The cubic root of 163313378 is about 546.6054035220.

The spelling of 163313378 in words is "one hundred sixty-three million, three hundred thirteen thousand, three hundred seventy-eight".