851061644413 has 8 divisors (see below), whose sum is σ = 895863365600. Its totient is φ = 806260823568.

The previous prime is 851061644371. The next prime is 851061644417. The reversal of 851061644413 is 314446160158.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-851061644413 is a prime.

It is a super-2 number, since 2×851061644413² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 851061644413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851061644417) 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, 2670343 + ... + 2972011.

It is an arithmetic number, because the mean of its divisors is an integer number (111982920700).

Almost surely, 2^851061644413 is an apocalyptic number.

It is an amenable number.

851061644413 is a deficient number, since it is larger than the sum of its proper divisors (44801721187).

851061644413 is a wasteful number, since it uses less digits than its factorization.

851061644413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450171.

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 851061644413 in words is "eight hundred fifty-one billion, sixty-one million, six hundred forty-four thousand, four hundred thirteen".