1581096109 has 2 divisors, whose sum is σ = 1581096110. Its totient is φ = 1581096108.

The previous prime is 1581096103. The next prime is 1581096119. The reversal of 1581096109 is 9016901851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1437168100 + 143928009 = 37910^2 + 11997^2 .

It is a cyclic number.

It is not a de Polignac number, because 1581096109 - 2⁷ = 1581095981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1581096103) 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 as a sum of consecutive naturals, namely, 790548054 + 790548055.

It is an arithmetic number, because the mean of its divisors is an integer number (790548055).

Almost surely, 2^1581096109 is an apocalyptic number.

It is an amenable number.

1581096109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1581096109 is an equidigital number, since it uses as much as digits as its factorization.

1581096109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 40.

The square root of 1581096109 is about 39762.9992455298. Note that the first 3 decimals coincide. The cubic root of 1581096109 is about 1164.9825582682.

The spelling of 1581096109 in words is "one billion, five hundred eighty-one million, ninety-six thousand, one hundred nine".