851865409713 has 16 divisors (see below), whose sum is σ = 1137696408000. Its totient is φ = 566972989440.

The previous prime is 851865409699. The next prime is 851865409721. The reversal of 851865409713 is 317904568158.

It is not a de Polignac number, because 851865409713 - 2¹⁰ = 851865408689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (851865409763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5283313 + ... + 5442161.

It is an arithmetic number, because the mean of its divisors is an integer number (71106025500).

Almost surely, 2^851865409713 is an apocalyptic number.

It is an amenable number.

851865409713 is a deficient number, since it is larger than the sum of its proper divisors (285830998287).

851865409713 is a wasteful number, since it uses less digits than its factorization.

851865409713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161792.

The product of its (nonzero) digits is 7257600, while the sum is 57.

The spelling of 851865409713 in words is "eight hundred fifty-one billion, eight hundred sixty-five million, four hundred nine thousand, seven hundred thirteen".