1808195401 has 4 divisors (see below), whose sum is σ = 1903363600. Its totient is φ = 1713027204.

The previous prime is 1808195399. The next prime is 1808195453. The reversal of 1808195401 is 1045918081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1808195401 - 2¹ = 1808195399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1808195491) 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, 47584071 + ... + 47584108.

It is an arithmetic number, because the mean of its divisors is an integer number (475840900).

Almost surely, 2^1808195401 is an apocalyptic number.

It is an amenable number.

1808195401 is a deficient number, since it is larger than the sum of its proper divisors (95168199).

1808195401 is an equidigital number, since it uses as much as digits as its factorization.

1808195401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95168198.

The product of its (nonzero) digits is 11520, while the sum is 37.

The square root of 1808195401 is about 42522.8809113400. The cubic root of 1808195401 is about 1218.2837556087.

The spelling of 1808195401 in words is "one billion, eight hundred eight million, one hundred ninety-five thousand, four hundred one".