42991671943 has 8 divisors (see below), whose sum is σ = 49658829840. Its totient is φ = 36784318080.

The previous prime is 42991671907. The next prime is 42991671991. The reversal of 42991671943 is 34917619924.

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

It is a cyclic number.

It is not a de Polignac number, because 42991671943 - 2¹⁷ = 42991540871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42991671043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114950808 + ... + 114951181.

It is an arithmetic number, because the mean of its divisors is an integer number (6207353730).

Almost surely, 2^42991671943 is an apocalyptic number.

42991671943 is a deficient number, since it is larger than the sum of its proper divisors (6667157897).

42991671943 is a wasteful number, since it uses less digits than its factorization.

42991671943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229902017.

The product of its digits is 2939328, while the sum is 55.

The spelling of 42991671943 in words is "forty-two billion, nine hundred ninety-one million, six hundred seventy-one thousand, nine hundred forty-three".