860642043653880 has 384 divisors, whose sum is σ = 2994404491653120. Its totient is φ = 222089924183040.

The previous prime is 860642043653863. The next prime is 860642043653893. The reversal of 860642043653880 is 88356340246068.

It is a happy number.

860642043653880 is a `hidden beast` number, since 8 + 6 + 0 + 6 + 420 + 43 + 65 + 38 + 80 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7108982229 + ... + 7109103291.

It is an arithmetic number, because the mean of its divisors is an integer number (7797928363680).

Almost surely, 2^{860642043653880} 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 860642043653880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1497202245826560).

860642043653880 is an abundant number, since it is smaller than the sum of its proper divisors (2133762447999240).

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

860642043653880 is a wasteful number, since it uses less digits than its factorization.

860642043653880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144713 (or 144697 counting only the distinct ones).

The product of its (nonzero) digits is 159252480, while the sum is 63.

The spelling of 860642043653880 in words is "eight hundred sixty trillion, six hundred forty-two billion, forty-three million, six hundred fifty-three thousand, eight hundred eighty".