1808788109242 has 8 divisors (see below), whose sum is σ = 2713206406356. Its totient is φ = 904385973792.

The previous prime is 1808788109209. The next prime is 1808788109257. The reversal of 1808788109242 is 2429018878081.

It can be written as a sum of positive squares in 2 ways, for example, as 1677649248081 + 131138861161 = 1295241^2 + 362131^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3756633 + ... + 4210684.

Almost surely, 2^{1808788109242} is an apocalyptic number.

1808788109242 is a deficient number, since it is larger than the sum of its proper divisors (904418297114).

1808788109242 is a wasteful number, since it uses less digits than its factorization.

1808788109242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8080832.

The product of its (nonzero) digits is 4128768, while the sum is 58.

The spelling of 1808788109242 in words is "one trillion, eight hundred eight billion, seven hundred eighty-eight million, one hundred nine thousand, two hundred forty-two".