42765442939 has 4 divisors (see below), whose sum is σ = 42777185656. Its totient is φ = 42753700224.

The previous prime is 42765442901. The next prime is 42765442949. The reversal of 42765442939 is 93924456724.

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 42765442939 - 2⁹ = 42765442427 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 42765442939.

It is not an unprimeable number, because it can be changed into a prime (42765442949) 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, 5865894 + ... + 5873179.

It is an arithmetic number, because the mean of its divisors is an integer number (10694296414).

Almost surely, 2^42765442939 is an apocalyptic number.

42765442939 is a deficient number, since it is larger than the sum of its proper divisors (11742717).

42765442939 is a wasteful number, since it uses less digits than its factorization.

42765442939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11742716.

The product of its digits is 13063680, while the sum is 55.

The spelling of 42765442939 in words is "forty-two billion, seven hundred sixty-five million, four hundred forty-two thousand, nine hundred thirty-nine".