842850688761 has 9 divisors (see below), whose sum is σ = 1217454973189. Its totient is φ = 561898623036.

The previous prime is 842850688751. The next prime is 842850688769. The reversal of 842850688761 is 167886058248.

The square root of 842850688761 is 918069.

It is a perfect power (a square), and thus also a powerful number.

842850688761 is a `hidden beast` number, since 8 + 42 + 8 + 506 + 8 + 87 + 6 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is a de Polignac number, because none of the positive numbers 2^k-842850688761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (842850688769) 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 8 ways as a sum of consecutive naturals, for example, 2601196 + ... + 2907218.

Almost surely, 2^842850688761 is an apocalyptic number.

842850688761 is the 918069-th square number.

842850688761 is the 459035-th centered octagonal number.

It is an amenable number.

842850688761 is a deficient number, since it is larger than the sum of its proper divisors (374604284428).

842850688761 is an frugal number, since it uses more digits than its factorization.

842850688761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612052 (or 306026 counting only the distinct ones).

The product of its (nonzero) digits is 41287680, while the sum is 63.

The spelling of 842850688761 in words is "eight hundred forty-two billion, eight hundred fifty million, six hundred eighty-eight thousand, seven hundred sixty-one".