1348561809 has 24 divisors (see below), whose sum is σ = 2227405440. Its totient is φ = 770188608.

The previous prime is 1348561807. The next prime is 1348561861. The reversal of 1348561809 is 9081658431.

1348561809 is a `hidden beast` number, since 1 + 3 + 4 + 8 + 561 + 80 + 9 = 666.

It is not a de Polignac number, because 1348561809 - 2¹ = 1348561807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1348561807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140052 + ... + 149370.

It is an arithmetic number, because the mean of its divisors is an integer number (92808560).

Almost surely, 2^1348561809 is an apocalyptic number.

It is an amenable number.

1348561809 is a deficient number, since it is larger than the sum of its proper divisors (878843631).

1348561809 is a wasteful number, since it uses less digits than its factorization.

1348561809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11629 (or 11626 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 1348561809 is about 36722.7696259419. The cubic root of 1348561809 is about 1104.8168404405.

The spelling of 1348561809 in words is "one billion, three hundred forty-eight million, five hundred sixty-one thousand, eight hundred nine".