6851072138850 has 384 divisors, whose sum is σ = 20000019916800. Its totient is φ = 1719695059200.

The previous prime is 6851072138843. The next prime is 6851072138887. The reversal of 6851072138850 is 588312701586.

6851072138850 is a `hidden beast` number, since 6 + 8 + 510 + 72 + 1 + 3 + 8 + 8 + 50 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 3109881849 + ... + 3109884051.

It is an arithmetic number, because the mean of its divisors is an integer number (52083385200).

Almost surely, 2^{6851072138850} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6851072138850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10000009958400).

6851072138850 is an abundant number, since it is smaller than the sum of its proper divisors (13148947777950).

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

6851072138850 is a wasteful number, since it uses less digits than its factorization.

6851072138850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2967 (or 2956 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 54.

The spelling of 6851072138850 in words is "six trillion, eight hundred fifty-one billion, seventy-two million, one hundred thirty-eight thousand, eight hundred fifty".