6850585140 has 144 divisors (see below), whose sum is σ = 22376737152. Its totient is φ = 1561400064.

The previous prime is 6850585087. The next prime is 6850585141. The reversal of 6850585140 is 415850586.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 6850585092 and 6850585101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6850585141) 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, 1093497 + ... + 1099743.

It is an arithmetic number, because the mean of its divisors is an integer number (155394008).

Almost surely, 2^6850585140 is an apocalyptic number.

6850585140 is a gapful number since it is divisible by the number (60) 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 6850585140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11188368576).

6850585140 is an abundant number, since it is smaller than the sum of its proper divisors (15526152012).

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

6850585140 is a wasteful number, since it uses less digits than its factorization.

6850585140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6646 (or 6637 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 42.

The square root of 6850585140 is about 82768.2616707636. The cubic root of 6850585140 is about 1899.2226866517. Note that the first 3 decimals are identical.

The spelling of 6850585140 in words is "six billion, eight hundred fifty million, five hundred eighty-five thousand, one hundred forty".