42004442555 has 4 divisors (see below), whose sum is σ = 50405331072. Its totient is φ = 33603554040.

The previous prime is 42004442497. The next prime is 42004442563. The reversal of 42004442555 is 55524440024.

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

It is not a de Polignac number, because 42004442555 - 2¹⁸ = 42004180411 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4200444251 + ... + 4200444260.

It is an arithmetic number, because the mean of its divisors is an integer number (12601332768).

Almost surely, 2^42004442555 is an apocalyptic number.

42004442555 is a deficient number, since it is larger than the sum of its proper divisors (8400888517).

42004442555 is an equidigital number, since it uses as much as digits as its factorization.

42004442555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8400888516.

The product of its (nonzero) digits is 128000, while the sum is 35.

Adding to 42004442555 its reverse (55524440024), we get a palindrome (97528882579).

The spelling of 42004442555 in words is "forty-two billion, four million, four hundred forty-two thousand, five hundred fifty-five".