6856518942 has 360 divisors, whose sum is σ = 20446846200. Its totient is φ = 1706769792.

The previous prime is 6856518917. The next prime is 6856518973. The reversal of 6856518942 is 2498156586.

6856518942 is a `hidden beast` number, since 6 + 85 + 6 + 518 + 9 + 42 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 25488784 + ... + 25489052.

It is an arithmetic number, because the mean of its divisors is an integer number (56796795).

Almost surely, 2^6856518942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6856518942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10223423100).

6856518942 is an abundant number, since it is smaller than the sum of its proper divisors (13590327258).

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

6856518942 is a wasteful number, since it uses less digits than its factorization.

6856518942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342 (or 313 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 54.

The square root of 6856518942 is about 82804.0997898051. The cubic root of 6856518942 is about 1899.7708811439.

The spelling of 6856518942 in words is "six billion, eight hundred fifty-six million, five hundred eighteen thousand, nine hundred forty-two".