1806522791047 has 4 divisors (see below), whose sum is σ = 1945486082680. Its totient is φ = 1667559499416.

The previous prime is 1806522791041. The next prime is 1806522791057. The reversal of 1806522791047 is 7401972256081.

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

It is a cyclic number.

It is not a de Polignac number, because 1806522791047 - 2³ = 1806522791039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1806522790985 and 1806522791003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1806522791041) 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, 69481645797 + ... + 69481645822.

It is an arithmetic number, because the mean of its divisors is an integer number (486371520670).

Almost surely, 2^{1806522791047} is an apocalyptic number.

1806522791047 is a deficient number, since it is larger than the sum of its proper divisors (138963291633).

1806522791047 is a wasteful number, since it uses less digits than its factorization.

1806522791047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138963291632.

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 1806522791047 in words is "one trillion, eight hundred six billion, five hundred twenty-two million, seven hundred ninety-one thousand, forty-seven".