42191954044 has 6 divisors (see below), whose sum is σ = 73835919584. Its totient is φ = 21095977020.

The previous prime is 42191954041. The next prime is 42191954069. The reversal of 42191954044 is 44045919124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42191954041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5273994252 + ... + 5273994259.

Almost surely, 2^42191954044 is an apocalyptic number.

It is an amenable number.

42191954044 is a deficient number, since it is larger than the sum of its proper divisors (31643965540).

42191954044 is a wasteful number, since it uses less digits than its factorization.

42191954044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10547988515 (or 10547988513 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 42191954044 in words is "forty-two billion, one hundred ninety-one million, nine hundred fifty-four thousand, forty-four".