42173761591 has 4 divisors (see below), whose sum is σ = 45417897112. Its totient is φ = 38929626072.

The previous prime is 42173761583. The next prime is 42173761633. The reversal of 42173761591 is 19516737124.

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

It is a cyclic number.

It is not a de Polignac number, because 42173761591 - 2³ = 42173761583 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 (42173741591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1622067741 + ... + 1622067766.

It is an arithmetic number, because the mean of its divisors is an integer number (11354474278).

Almost surely, 2^42173761591 is an apocalyptic number.

42173761591 is a deficient number, since it is larger than the sum of its proper divisors (3244135521).

42173761591 is a wasteful number, since it uses less digits than its factorization.

42173761591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3244135520.

The product of its digits is 317520, while the sum is 46.

The spelling of 42173761591 in words is "forty-two billion, one hundred seventy-three million, seven hundred sixty-one thousand, five hundred ninety-one".