868138378736 has 20 divisors (see below), whose sum is σ = 1684744251312. Its totient is φ = 433365668736.

The previous prime is 868138378717. The next prime is 868138378753. The reversal of 868138378736 is 637873831868.

It is a super-5 number, since 5×868138378736⁵ (a number of 61 digits) contains 55555 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43959860 + ... + 43979603.

Almost surely, 2^868138378736 is an apocalyptic number.

It is an amenable number.

868138378736 is a deficient number, since it is larger than the sum of its proper divisors (816605872576).

868138378736 is a wasteful number, since it uses less digits than its factorization.

868138378736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87940088 (or 87940082 counting only the distinct ones).

The product of its digits is 195084288, while the sum is 68.

The spelling of 868138378736 in words is "eight hundred sixty-eight billion, one hundred thirty-eight million, three hundred seventy-eight thousand, seven hundred thirty-six".