1418566307821 has 4 divisors (see below), whose sum is σ = 1527686793052. Its totient is φ = 1309445822592.

The previous prime is 1418566307801. The next prime is 1418566307867. The reversal of 1418566307821 is 1287036658141.

1418566307821 = 842189² + 842190².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 709282311721 + 709283996100 = 842189^2 + 842190^2 .

It is a cyclic number.

It is not a de Polignac number, because 1418566307821 - 2¹¹ = 1418566305773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1418566307801) 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 3 ways as a sum of consecutive naturals, for example, 54560242596 + ... + 54560242621.

It is an arithmetic number, because the mean of its divisors is an integer number (381921698263).

Almost surely, 2^{1418566307821} is an apocalyptic number.

1418566307821 is the 842190-th centered square number.

It is an amenable number.

1418566307821 is a deficient number, since it is larger than the sum of its proper divisors (109120485231).

1418566307821 is a wasteful number, since it uses less digits than its factorization.

1418566307821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109120485230.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 1418566307821 in words is "one trillion, four hundred eighteen billion, five hundred sixty-six million, three hundred seven thousand, eight hundred twenty-one".