852167980861 has 4 divisors (see below), whose sum is σ = 852594280000. Its totient is φ = 851741681724.

The previous prime is 852167980849. The next prime is 852167980891. The reversal of 852167980861 is 168089761258.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 168089761258 = 2 ⋅84044880629.

It is a cyclic number.

It is not a de Polignac number, because 852167980861 - 2²³ = 852159592253 is a prime.

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 852167980861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (852167980831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213146571 + ... + 213150568.

It is an arithmetic number, because the mean of its divisors is an integer number (213148570000).

Almost surely, 2^852167980861 is an apocalyptic number.

It is an amenable number.

852167980861 is a deficient number, since it is larger than the sum of its proper divisors (426299139).

852167980861 is a wasteful number, since it uses less digits than its factorization.

852167980861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426299138.

The product of its (nonzero) digits is 11612160, while the sum is 61.

The spelling of 852167980861 in words is "eight hundred fifty-two billion, one hundred sixty-seven million, nine hundred eighty thousand, eight hundred sixty-one".