801550018 has 8 divisors (see below), whose sum is σ = 1234820412. Its totient is φ = 389943216.

The previous prime is 801549997. The next prime is 801550021. The reversal of 801550018 is 810055108.

It can be written as a sum of positive squares in 2 ways, for example, as 710595649 + 90954369 = 26657^2 + 9537^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5415805 + ... + 5415952.

Almost surely, 2^801550018 is an apocalyptic number.

801550018 is a deficient number, since it is larger than the sum of its proper divisors (433270394).

801550018 is a wasteful number, since it uses less digits than its factorization.

801550018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10831796.

The product of its (nonzero) digits is 1600, while the sum is 28.

The square root of 801550018 is about 28311.6586939021. The cubic root of 801550018 is about 928.9169254479.

The spelling of 801550018 in words is "eight hundred one million, five hundred fifty thousand, eighteen".