818834607643 has 16 divisors (see below), whose sum is σ = 937424023200. Its totient is φ = 708976108800.

The previous prime is 818834607637. The next prime is 818834607653. The reversal of 818834607643 is 346706438818.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-818834607643 is a prime.

It is a super-2 number, since 2×818834607643² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (818834607653) 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, 16386538 + ... + 16436431.

It is an arithmetic number, because the mean of its divisors is an integer number (58589001450).

Almost surely, 2^818834607643 is an apocalyptic number.

818834607643 is a deficient number, since it is larger than the sum of its proper divisors (118589415557).

818834607643 is a wasteful number, since it uses less digits than its factorization.

818834607643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32823102.

The product of its (nonzero) digits is 18579456, while the sum is 58.

The spelling of 818834607643 in words is "eight hundred eighteen billion, eight hundred thirty-four million, six hundred seven thousand, six hundred forty-three".