42040404404 has 6 divisors (see below), whose sum is σ = 73570707714. Its totient is φ = 21020202200.

The previous prime is 42040404379. The next prime is 42040404421. The reversal of 42040404404 is 40440404024.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 41209812004 + 830592400 = 203002^2 + 28820^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5255050547 + ... + 5255050554.

It is an arithmetic number, because the mean of its divisors is an integer number (12261784619).

Almost surely, 2^42040404404 is an apocalyptic number.

It is an amenable number.

42040404404 is a deficient number, since it is larger than the sum of its proper divisors (31530303310).

42040404404 is a wasteful number, since it uses less digits than its factorization.

42040404404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10510101105 (or 10510101103 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 42040404404 its reverse (40440404024), we get a palindrome (82480808428).

The spelling of 42040404404 in words is "forty-two billion, forty million, four hundred four thousand, four hundred four".