378633161 has 4 divisors (see below), whose sum is σ = 384840324. Its totient is φ = 372426000.

The previous prime is 378633139. The next prime is 378633187. The reversal of 378633161 is 161336873.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19758025 + 358875136 = 4445^2 + 18944^2 .

It is a cyclic number.

It is not a de Polignac number, because 378633161 - 2⁶ = 378633097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378633461) 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, 3103490 + ... + 3103611.

It is an arithmetic number, because the mean of its divisors is an integer number (96210081).

Almost surely, 2^378633161 is an apocalyptic number.

It is an amenable number.

378633161 is a deficient number, since it is larger than the sum of its proper divisors (6207163).

378633161 is an equidigital number, since it uses as much as digits as its factorization.

378633161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6207162.

The product of its digits is 54432, while the sum is 38.

The square root of 378633161 is about 19458.4984261376. The cubic root of 378633161 is about 723.4461598986.

The spelling of 378633161 in words is "three hundred seventy-eight million, six hundred thirty-three thousand, one hundred sixty-one".