42129105775 has 12 divisors (see below), whose sum is σ = 52269379992. Its totient is φ = 33684388640.

The previous prime is 42129105769. The next prime is 42129105779. The reversal of 42129105775 is 57750192124.

It is not a de Polignac number, because 42129105775 - 2⁵ = 42129105743 is a prime.

It is a super-2 number, since 2×42129105775² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42129105779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 426832 + ... + 516181.

It is an arithmetic number, because the mean of its divisors is an integer number (4355781666).

Almost surely, 2^42129105775 is an apocalyptic number.

42129105775 is a deficient number, since it is larger than the sum of its proper divisors (10140274217).

42129105775 is a wasteful number, since it uses less digits than its factorization.

42129105775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944810 (or 944805 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 43.

Adding to 42129105775 its reverse (57750192124), we get a palindrome (99879297899).

The spelling of 42129105775 in words is "forty-two billion, one hundred twenty-nine million, one hundred five thousand, seven hundred seventy-five".