1340446563 has 14 divisors (see below), whose sum is σ = 2009751564. Its totient is φ = 893630556.

The previous prime is 1340446537. The next prime is 1340446573. The reversal of 1340446563 is 3656440431.

1340446563 is a `hidden beast` number, since 13 + 40 + 4 + 46 + 563 = 666.

It is not a de Polignac number, because 1340446563 - 2¹⁰ = 1340445539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1340446573) 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 in 13 ways as a sum of consecutive naturals, for example, 918645 + ... + 920102.

Almost surely, 2^1340446563 is an apocalyptic number.

1340446563 is a deficient number, since it is larger than the sum of its proper divisors (669305001).

1340446563 is an frugal number, since it uses more digits than its factorization.

1340446563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1838765 (or 1838750 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The square root of 1340446563 is about 36612.1095131105. The cubic root of 1340446563 is about 1102.5962265032.

Adding to 1340446563 its reverse (3656440431), we get a palindrome (4996886994).

The spelling of 1340446563 in words is "one billion, three hundred forty million, four hundred forty-six thousand, five hundred sixty-three".