42204323661 has 4 divisors (see below), whose sum is σ = 56272431552. Its totient is φ = 28136215772.

The previous prime is 42204323647. The next prime is 42204323663. The reversal of 42204323661 is 16632340224.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42204323661 - 2⁶ = 42204323597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42204323663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7034053941 + ... + 7034053946.

It is an arithmetic number, because the mean of its divisors is an integer number (14068107888).

Almost surely, 2^42204323661 is an apocalyptic number.

It is an amenable number.

42204323661 is a deficient number, since it is larger than the sum of its proper divisors (14068107891).

42204323661 is a wasteful number, since it uses less digits than its factorization.

42204323661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14068107890.

The product of its (nonzero) digits is 41472, while the sum is 33.

Adding to 42204323661 its reverse (16632340224), we get a palindrome (58836663885).

The spelling of 42204323661 in words is "forty-two billion, two hundred four million, three hundred twenty-three thousand, six hundred sixty-one".