1814814661 has 8 divisors (see below), whose sum is σ = 1980115200. Its totient is φ = 1649567040.

The previous prime is 1814814647. The next prime is 1814814667. The reversal of 1814814661 is 1664184181.

It is a happy number.

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

It is not a de Polignac number, because 1814814661 - 2²¹ = 1812717509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1814814667) 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 7 ways as a sum of consecutive naturals, for example, 102685 + ... + 119053.

It is an arithmetic number, because the mean of its divisors is an integer number (247514400).

Almost surely, 2^1814814661 is an apocalyptic number.

1814814661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1814814661 is a deficient number, since it is larger than the sum of its proper divisors (165300539).

1814814661 is a wasteful number, since it uses less digits than its factorization.

1814814661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26459.

The product of its digits is 36864, while the sum is 40.

The square root of 1814814661 is about 42600.6415562019. The cubic root of 1814814661 is about 1219.7685355471.

The spelling of 1814814661 in words is "one billion, eight hundred fourteen million, eight hundred fourteen thousand, six hundred sixty-one".