1671090345 has 56 divisors (see below), whose sum is σ = 3110459400. Its totient is φ = 860461056.

The previous prime is 1671090269. The next prime is 1671090367. The reversal of 1671090345 is 5430901761.

It can be written as a sum of positive squares in 4 ways, for example, as 2286144 + 1668804201 = 1512^2 + 40851^2 .

It is not a de Polignac number, because 1671090345 - 2¹⁷ = 1670959273 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 97801 + ... + 113609.

Almost surely, 2^1671090345 is an apocalyptic number.

1671090345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1671090345 is a deficient number, since it is larger than the sum of its proper divisors (1439369055).

1671090345 is an equidigital number, since it uses as much as digits as its factorization.

1671090345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15861 (or 15846 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 1671090345 is about 40878.9719171116. The cubic root of 1671090345 is about 1186.6791449245.

The spelling of 1671090345 in words is "one billion, six hundred seventy-one million, ninety thousand, three hundred forty-five".