1808947339663 has 16 divisors (see below), whose sum is σ = 1938748059360. Its totient is φ = 1681752416256.

The previous prime is 1808947339649. The next prime is 1808947339679. The reversal of 1808947339663 is 3669337498081.

It is a cyclic number.

It is not a de Polignac number, because 1808947339663 - 2²⁹ = 1808410468751 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 (1808947339603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8840353 + ... + 9042661.

It is an arithmetic number, because the mean of its divisors is an integer number (121171753710).

Almost surely, 2^{1808947339663} is an apocalyptic number.

1808947339663 is a deficient number, since it is larger than the sum of its proper divisors (129800719697).

1808947339663 is a wasteful number, since it uses less digits than its factorization.

1808947339663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208746.

The product of its (nonzero) digits is 141087744, while the sum is 67.

The spelling of 1808947339663 in words is "one trillion, eight hundred eight billion, nine hundred forty-seven million, three hundred thirty-nine thousand, six hundred sixty-three".