42535123566 has 64 divisors (see below), whose sum is σ = 96527047680. Its totient is φ = 12387185280.

The previous prime is 42535123541. The next prime is 42535123567. The reversal of 42535123566 is 66532153524.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42535123567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1621636 + ... + 1647656.

It is an arithmetic number, because the mean of its divisors is an integer number (1508235120).

Almost surely, 2^42535123566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42535123566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48263523840).

42535123566 is an abundant number, since it is smaller than the sum of its proper divisors (53991924114).

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

42535123566 is a wasteful number, since it uses less digits than its factorization.

42535123566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27161.

The product of its digits is 648000, while the sum is 42.

The spelling of 42535123566 in words is "forty-two billion, five hundred thirty-five million, one hundred twenty-three thousand, five hundred sixty-six".