942435165681 has 9 divisors (see below), whose sum is σ = 1361299446091. Its totient is φ = 628288168872.

The previous prime is 942435165671. The next prime is 942435165689. The reversal of 942435165681 is 186561534249.

The square root of 942435165681 is 970791.

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

942435165681 is a `hidden beast` number, since 9 + 4 + 2 + 43 + 516 + 5 + 6 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 340699853025 + 601735312656 = 583695^2 + 775716^2 .

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

It is not a de Polignac number, because 942435165681 - 2⁵ = 942435165649 is a prime.

It is a super-2 number, since 2×942435165681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (942435165689) 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, 2750575 + ... + 3074171.

Almost surely, 2^942435165681 is an apocalyptic number.

942435165681 is the 970791-st square number.

942435165681 is the 485396-th centered octagonal number.

It is an amenable number.

942435165681 is a deficient number, since it is larger than the sum of its proper divisors (418864280410).

942435165681 is an frugal number, since it uses more digits than its factorization.

942435165681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647200 (or 323600 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The spelling of 942435165681 in words is "nine hundred forty-two billion, four hundred thirty-five million, one hundred sixty-five thousand, six hundred eighty-one".