6855079140 has 192 divisors, whose sum is σ = 26248696320. Its totient is φ = 1446336000.

The previous prime is 6855079139. The next prime is 6855079169. The reversal of 6855079140 is 419705586.

6855079140 is a `hidden beast` number, since 6 + 8 + 550 + 7 + 91 + 4 + 0 = 666.

It is a super-2 number, since 2×6855079140² = 93984220031326279200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 20611 + ... + 118890.

It is an arithmetic number, because the mean of its divisors is an integer number (136711960).

Almost surely, 2^6855079140 is an apocalyptic number.

6855079140 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 6855079140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13124348160).

6855079140 is an abundant number, since it is smaller than the sum of its proper divisors (19393617180).

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

6855079140 is a wasteful number, since it uses less digits than its factorization.

6855079140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139539 (or 139531 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 6855079140 is about 82795.4053072995. The cubic root of 6855079140 is about 1899.6378940590.

The spelling of 6855079140 in words is "six billion, eight hundred fifty-five million, seventy-nine thousand, one hundred forty".