801564378 has 8 divisors (see below), whose sum is σ = 1603128768. Its totient is φ = 267188124.

The previous prime is 801564377. The next prime is 801564397. The reversal of 801564378 is 873465108.

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

801564378 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (801564371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66797026 + ... + 66797037.

It is an arithmetic number, because the mean of its divisors is an integer number (200391096).

Almost surely, 2^801564378 is an apocalyptic number.

801564378 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

801564378 is a wasteful number, since it uses less digits than its factorization.

801564378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133594068.

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 801564378 is about 28311.9122985361. The cubic root of 801564378 is about 928.9224726864.

The spelling of 801564378 in words is "eight hundred one million, five hundred sixty-four thousand, three hundred seventy-eight".