42222635561 has 4 divisors (see below), whose sum is σ = 42609999300. Its totient is φ = 41835271824.

The previous prime is 42222635501. The next prime is 42222635573. The reversal of 42222635561 is 16553622224.

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 32710339600 + 9512295961 = 180860^2 + 97531^2 .

It is a cyclic number.

It is not a de Polignac number, because 42222635561 - 2²⁶ = 42155526697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42222635501) 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, 193681706 + ... + 193681923.

It is an arithmetic number, because the mean of its divisors is an integer number (10652499825).

Almost surely, 2^42222635561 is an apocalyptic number.

It is an amenable number.

42222635561 is a deficient number, since it is larger than the sum of its proper divisors (387363739).

42222635561 is a wasteful number, since it uses less digits than its factorization.

42222635561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387363738.

The product of its digits is 172800, while the sum is 38.

The spelling of 42222635561 in words is "forty-two billion, two hundred twenty-two million, six hundred thirty-five thousand, five hundred sixty-one".