6855399936 has 360 divisors, whose sum is σ = 24845936544. Its totient is φ = 1767813120.

The previous prime is 6855399911. The next prime is 6855399949. The reversal of 6855399936 is 6399935586.

6855399936 is a `hidden beast` number, since 6 + 8 + 5 + 539 + 9 + 93 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

Its product of digits (47239200) is a multiple of the sum of its prime divisors (162).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 49319355 + ... + 49319493.

Almost surely, 2^6855399936 is an apocalyptic number.

6855399936 is a gapful number since it is divisible by the number (66) 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 6855399936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12422968272).

6855399936 is an abundant number, since it is smaller than the sum of its proper divisors (17990536608).

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

6855399936 is a wasteful number, since it uses less digits than its factorization.

6855399936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 162 counting only the distinct ones).

The product of its digits is 47239200, while the sum is 63.

The square root of 6855399936 is about 82797.3425660510. The cubic root of 6855399936 is about 1899.6675259432.

The spelling of 6855399936 in words is "six billion, eight hundred fifty-five million, three hundred ninety-nine thousand, nine hundred thirty-six".