851685304154412 has 576 divisors, whose sum is σ = 2546973993467904. Its totient is φ = 216661797181440.

The previous prime is 851685304154389. The next prime is 851685304154453. The reversal of 851685304154412 is 214451403586158.

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, 221389471473 + ... + 221389475319.

Almost surely, 2^{851685304154412} 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 851685304154412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1273486996733952).

851685304154412 is an abundant number, since it is smaller than the sum of its proper divisors (1695288689313492).

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

851685304154412 is a wasteful number, since it uses less digits than its factorization.

851685304154412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5438 (or 5423 counting only the distinct ones).

The product of its (nonzero) digits is 18432000, while the sum is 57.

The spelling of 851685304154412 in words is "eight hundred fifty-one trillion, six hundred eighty-five billion, three hundred four million, one hundred fifty-four thousand, four hundred twelve".