1806847945 has 8 divisors (see below), whose sum is σ = 2477962944. Its totient is φ = 1238981424.

The previous prime is 1806847937. The next prime is 1806847969. The reversal of 1806847945 is 5497486081.

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

It is a cyclic number.

It is not a de Polignac number, because 1806847945 - 2³ = 1806847937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1806847892 and 1806847901.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25812079 + ... + 25812148.

It is an arithmetic number, because the mean of its divisors is an integer number (309745368).

Almost surely, 2^1806847945 is an apocalyptic number.

It is an amenable number.

1806847945 is a deficient number, since it is larger than the sum of its proper divisors (671114999).

1806847945 is an equidigital number, since it uses as much as digits as its factorization.

1806847945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51624239.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The square root of 1806847945 is about 42507.0340649639. The cubic root of 1806847945 is about 1217.9810612410.

The spelling of 1806847945 in words is "one billion, eight hundred six million, eight hundred forty-seven thousand, nine hundred forty-five".