852568957661 has 8 divisors (see below), whose sum is σ = 875079185400. Its totient is φ = 830140437760.

The previous prime is 852568957649. The next prime is 852568957741. The reversal of 852568957661 is 166759865258.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9237132100 + 843331825561 = 96110^2 + 918331^2 .

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-852568957661 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 852568957591 and 852568957600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (852568957631) 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, 20405816 + ... + 20447553.

It is an arithmetic number, because the mean of its divisors is an integer number (109384898175).

Almost surely, 2^852568957661 is an apocalyptic number.

It is an amenable number.

852568957661 is a deficient number, since it is larger than the sum of its proper divisors (22510227739).

852568957661 is a wasteful number, since it uses less digits than its factorization.

852568957661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40853919.

The product of its digits is 217728000, while the sum is 68.

The spelling of 852568957661 in words is "eight hundred fifty-two billion, five hundred sixty-eight million, nine hundred fifty-seven thousand, six hundred sixty-one".