868388999956 has 12 divisors (see below), whose sum is σ = 1519731095092. Its totient is φ = 434180115648.

The previous prime is 868388999941. The next prime is 868388999957. The reversal of 868388999956 is 659999883868.

It can be written as a sum of positive squares in 2 ways, for example, as 752833875600 + 115555124356 = 867660^2 + 339934^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868388999957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3459675 + ... + 3702178.

Almost surely, 2^868388999956 is an apocalyptic number.

It is an amenable number.

868388999956 is a deficient number, since it is larger than the sum of its proper divisors (651342095136).

868388999956 is a wasteful number, since it uses less digits than its factorization.

868388999956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7192170 (or 7192168 counting only the distinct ones).

The product of its digits is 14511882240, while the sum is 88.

The spelling of 868388999956 in words is "eight hundred sixty-eight billion, three hundred eighty-eight million, nine hundred ninety-nine thousand, nine hundred fifty-six".