8042204561 has 4 divisors (see below), whose sum is σ = 8132566500. Its totient is φ = 7951842624.

The previous prime is 8042204531. The next prime is 8042204567. The reversal of 8042204561 is 1654022408.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2280635536 + 5761569025 = 47756^2 + 75905^2 .

It is a cyclic number.

It is not a de Polignac number, because 8042204561 - 2²² = 8038010257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8042204567) 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, 45180836 + ... + 45181013.

It is an arithmetic number, because the mean of its divisors is an integer number (2033141625).

Almost surely, 2^8042204561 is an apocalyptic number.

It is an amenable number.

8042204561 is a deficient number, since it is larger than the sum of its proper divisors (90361939).

8042204561 is an equidigital number, since it uses as much as digits as its factorization.

8042204561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90361938.

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 8042204561 is about 89678.3394192823. The cubic root of 8042204561 is about 2003.5108800045.

Adding to 8042204561 its reverse (1654022408), we get a palindrome (9696226969).

The spelling of 8042204561 in words is "eight billion, forty-two million, two hundred four thousand, five hundred sixty-one".