42129583687 has 4 divisors (see below), whose sum is σ = 43025957856. Its totient is φ = 41233209520.

The previous prime is 42129583681. The next prime is 42129583729. The reversal of 42129583687 is 78638592124.

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 42129583687 - 2²³ = 42121195079 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 (42129583681) 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, 448187014 + ... + 448187107.

It is an arithmetic number, because the mean of its divisors is an integer number (10756489464).

Almost surely, 2^42129583687 is an apocalyptic number.

42129583687 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

42129583687 is a deficient number, since it is larger than the sum of its proper divisors (896374169).

42129583687 is an equidigital number, since it uses as much as digits as its factorization.

42129583687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896374168.

The product of its digits is 5806080, while the sum is 55.

The spelling of 42129583687 in words is "forty-two billion, one hundred twenty-nine million, five hundred eighty-three thousand, six hundred eighty-seven".