868740142140 has 240 divisors, whose sum is σ = 2972062558080. Its totient is φ = 211136440320.

The previous prime is 868740142111. The next prime is 868740142141. The reversal of 868740142140 is 41241047868.

868740142140 is a `hidden beast` number, since 8 + 68 + 7 + 401 + 42 + 140 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868740142141) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1402660 + ... + 1924820.

It is an arithmetic number, because the mean of its divisors is an integer number (12383593992).

Almost surely, 2^868740142140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 868740142140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1486031279040).

868740142140 is an abundant number, since it is smaller than the sum of its proper divisors (2103322415940).

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

868740142140 is a wasteful number, since it uses less digits than its factorization.

868740142140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522274 (or 522263 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 45.

The spelling of 868740142140 in words is "eight hundred sixty-eight billion, seven hundred forty million, one hundred forty-two thousand, one hundred forty".