1808815054 has 4 divisors (see below), whose sum is σ = 2713222584. Its totient is φ = 904407526.

The previous prime is 1808815051. The next prime is 1808815061. The reversal of 1808815054 is 4505188081.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1808814998 and 1808815016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1808815051) by changing a digit.

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 as a sum of consecutive naturals, namely, 452203762 + ... + 452203765.

It is an arithmetic number, because the mean of its divisors is an integer number (678305646).

Almost surely, 2^1808815054 is an apocalyptic number.

1808815054 is a deficient number, since it is larger than the sum of its proper divisors (904407530).

1808815054 is an equidigital number, since it uses as much as digits as its factorization.

1808815054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904407529.

The product of its (nonzero) digits is 51200, while the sum is 40.

The square root of 1808815054 is about 42530.1663998626. The cubic root of 1808815054 is about 1218.4229048338.

The spelling of 1808815054 in words is "one billion, eight hundred eight million, eight hundred fifteen thousand, fifty-four".