42422440778 has 8 divisors (see below), whose sum is σ = 63634953540. Its totient is φ = 21210789600.

The previous prime is 42422440777. The next prime is 42422440793. The reversal of 42422440778 is 87704422424.

It can be written as a sum of positive squares in 2 ways, for example, as 42326067289 + 96373489 = 205733^2 + 9817^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42422440777) 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, 73643 + ... + 300446.

Almost surely, 2^42422440778 is an apocalyptic number.

42422440778 is a deficient number, since it is larger than the sum of its proper divisors (21212512762).

42422440778 is a wasteful number, since it uses less digits than its factorization.

42422440778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430792.

The product of its (nonzero) digits is 802816, while the sum is 44.

The spelling of 42422440778 in words is "forty-two billion, four hundred twenty-two million, four hundred forty thousand, seven hundred seventy-eight".