863645399934 has 16 divisors (see below), whose sum is σ = 1756566915840. Its totient is φ = 283002447320.

The previous prime is 863645399933. The next prime is 863645399951. The reversal of 863645399934 is 439993546368.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863645399933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1219837782 + ... + 1219838489.

It is an arithmetic number, because the mean of its divisors is an integer number (109785432240).

Almost surely, 2^863645399934 is an apocalyptic number.

863645399934 is an abundant number, since it is smaller than the sum of its proper divisors (892921515906).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

863645399934 is a wasteful number, since it uses less digits than its factorization.

863645399934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2439676335.

The product of its digits is 453496320, while the sum is 69.

The spelling of 863645399934 in words is "eight hundred sixty-three billion, six hundred forty-five million, three hundred ninety-nine thousand, nine hundred thirty-four".