851961706851 has 8 divisors (see below), whose sum is σ = 1136302943760. Its totient is φ = 567797470592.

The previous prime is 851961706819. The next prime is 851961706853. The reversal of 851961706851 is 158607169158.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 851961706851 - 2⁵ = 851961706819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 851961706791 and 851961706800.

It is not an unprimeable number, because it can be changed into a prime (851961706853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44238930 + ... + 44258183.

It is an arithmetic number, because the mean of its divisors is an integer number (142037867970).

Almost surely, 2^851961706851 is an apocalyptic number.

851961706851 is a deficient number, since it is larger than the sum of its proper divisors (284341236909).

851961706851 is a wasteful number, since it uses less digits than its factorization.

851961706851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88500325.

The product of its (nonzero) digits is 3628800, while the sum is 57.

The spelling of 851961706851 in words is "eight hundred fifty-one billion, nine hundred sixty-one million, seven hundred six thousand, eight hundred fifty-one".