42129583686 has 12 divisors (see below), whose sum is σ = 91280764692. Its totient is φ = 14043194556.

The previous prime is 42129583681. The next prime is 42129583729. The reversal of 42129583686 is 68638592124.

42129583686 is a `hidden beast` number, since 42 + 12 + 9 + 583 + 6 + 8 + 6 = 666.

It is a Curzon 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 5 ways as a sum of consecutive naturals, for example, 1170266196 + ... + 1170266231.

It is an arithmetic number, because the mean of its divisors is an integer number (7606730391).

Almost surely, 2^42129583686 is an apocalyptic number.

42129583686 is an abundant number, since it is smaller than the sum of its proper divisors (49151181006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42129583686 is a wasteful number, since it uses less digits than its factorization.

42129583686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2340532435 (or 2340532432 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The spelling of 42129583686 in words is "forty-two billion, one hundred twenty-nine million, five hundred eighty-three thousand, six hundred eighty-six".