8160781042 has 8 divisors (see below), whose sum is σ = 12291965532. Its totient is φ = 4063459200.

The previous prime is 8160781039. The next prime is 8160781049. The reversal of 8160781042 is 2401870618.

It can be written as a sum of positive squares in 2 ways, for example, as 7894144801 + 266636241 = 88849^2 + 16329^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 8160780992 and 8160781010.

It is not an unprimeable number, because it can be changed into a prime (8160781049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8465059 + ... + 8466022.

Almost surely, 2^8160781042 is an apocalyptic number.

8160781042 is a deficient number, since it is larger than the sum of its proper divisors (4131184490).

8160781042 is a wasteful number, since it uses less digits than its factorization.

8160781042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16931324.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 8160781042 is about 90337.0413617803. The cubic root of 8160781042 is about 2013.3096502911.

The spelling of 8160781042 in words is "eight billion, one hundred sixty million, seven hundred eighty-one thousand, forty-two".