1080646109 has 4 divisors (see below), whose sum is σ = 1137522240. Its totient is φ = 1023769980.

The previous prime is 1080646093. The next prime is 1080646121. The reversal of 1080646109 is 9016460801.

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 1080646109 - 2⁴ = 1080646093 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1080646129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28438037 + ... + 28438074.

It is an arithmetic number, because the mean of its divisors is an integer number (284380560).

Almost surely, 2^1080646109 is an apocalyptic number.

1080646109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1080646109 is a deficient number, since it is larger than the sum of its proper divisors (56876131).

1080646109 is an equidigital number, since it uses as much as digits as its factorization.

1080646109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56876130.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 1080646109 is about 32873.1822159036. The cubic root of 1080646109 is about 1026.1901255247.

The spelling of 1080646109 in words is "one billion, eighty million, six hundred forty-six thousand, one hundred nine".