860651638320 has 320 divisors, whose sum is σ = 2852251729920. Its totient is φ = 213930393600.

The previous prime is 860651638313. The next prime is 860651638349. The reversal of 860651638320 is 23836156068.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 860651638320.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 186245610 + ... + 186250230.

It is an arithmetic number, because the mean of its divisors is an integer number (8913286656).

Almost surely, 2^860651638320 is an apocalyptic number.

860651638320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 860651638320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1426125864960).

860651638320 is an abundant number, since it is smaller than the sum of its proper divisors (1991600091600).

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

860651638320 is a wasteful number, since it uses less digits than its factorization.

860651638320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5084 (or 5078 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 860651638320 in words is "eight hundred sixty billion, six hundred fifty-one million, six hundred thirty-eight thousand, three hundred twenty".