42143440091 has 8 divisors (see below), whose sum is σ = 43093627344. Its totient is φ = 41198994720.

The previous prime is 42143440051. The next prime is 42143440177. The reversal of 42143440091 is 19004434124.

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 42143440091 - 2¹⁰ = 42143439067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42143440051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1420625 + ... + 1449986.

It is an arithmetic number, because the mean of its divisors is an integer number (5386703418).

Almost surely, 2^42143440091 is an apocalyptic number.

42143440091 is a deficient number, since it is larger than the sum of its proper divisors (950187253).

42143440091 is a wasteful number, since it uses less digits than its factorization.

42143440091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2870941.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 42143440091 in words is "forty-two billion, one hundred forty-three million, four hundred forty thousand, ninety-one".