42435565939 has 4 divisors (see below), whose sum is σ = 45699840256. Its totient is φ = 39171291624.

The previous prime is 42435565897. The next prime is 42435565951. The reversal of 42435565939 is 93956553424.

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 42435565939 - 2²¹ = 42433468787 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42435565939.

It is not an unprimeable number, because it can be changed into a prime (42435565999) 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, 1632137139 + ... + 1632137164.

It is an arithmetic number, because the mean of its divisors is an integer number (11424960064).

Almost surely, 2^42435565939 is an apocalyptic number.

42435565939 is a deficient number, since it is larger than the sum of its proper divisors (3264274317).

42435565939 is a wasteful number, since it uses less digits than its factorization.

42435565939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3264274316.

The product of its digits is 17496000, while the sum is 55.

The spelling of 42435565939 in words is "forty-two billion, four hundred thirty-five million, five hundred sixty-five thousand, nine hundred thirty-nine".