6881312731158 has 96 divisors (see below), whose sum is σ = 15544469397600. Its totient is φ = 2197331136000.

The previous prime is 6881312731157. The next prime is 6881312731201. The reversal of 6881312731158 is 8511372131886.

6881312731158 is a `hidden beast` number, since 6 + 8 + 8 + 1 + 312 + 7 + 311 + 5 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6881312731157) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 668018608 + ... + 668028908.

It is an arithmetic number, because the mean of its divisors is an integer number (161921556225).

Almost surely, 2^{6881312731158} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6881312731158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7772234698800).

6881312731158 is an abundant number, since it is smaller than the sum of its proper divisors (8663156666442).

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

6881312731158 is a wasteful number, since it uses less digits than its factorization.

6881312731158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20238 (or 20235 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The spelling of 6881312731158 in words is "six trillion, eight hundred eighty-one billion, three hundred twelve million, seven hundred thirty-one thousand, one hundred fifty-eight".