6871855536 has 320 divisors, whose sum is σ = 24648422400. Its totient is φ = 1784623104.

The previous prime is 6871855519. The next prime is 6871855537. The reversal of 6871855536 is 6355581786.

6871855536 is a `hidden beast` number, since 6 + 8 + 7 + 1 + 85 + 553 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (6871855537) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2632600 + ... + 2635208.

It is an arithmetic number, because the mean of its divisors is an integer number (77026320).

Almost surely, 2^6871855536 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 6871855536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12324211200).

6871855536 is an abundant number, since it is smaller than the sum of its proper divisors (17776566864).

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

6871855536 is a wasteful number, since it uses less digits than its factorization.

6871855536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2713 (or 2701 counting only the distinct ones).

The product of its digits is 6048000, while the sum is 54.

The square root of 6871855536 is about 82896.6557588423. The cubic root of 6871855536 is about 1901.1862892726.

The spelling of 6871855536 in words is "six billion, eight hundred seventy-one million, eight hundred fifty-five thousand, five hundred thirty-six".