42442789357 has 4 divisors (see below), whose sum is σ = 42446680956. Its totient is φ = 42438897760.

The previous prime is 42442789351. The next prime is 42442789463. The reversal of 42442789357 is 75398724424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27751894921 + 14690894436 = 166589^2 + 121206^2 .

It is a cyclic number.

It is not a de Polignac number, because 42442789357 - 2¹⁹ = 42442265069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42442789298 and 42442789307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42442789351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1929394 + ... + 1951267.

It is an arithmetic number, because the mean of its divisors is an integer number (10611670239).

Almost surely, 2^42442789357 is an apocalyptic number.

It is an amenable number.

42442789357 is a deficient number, since it is larger than the sum of its proper divisors (3891599).

42442789357 is a wasteful number, since it uses less digits than its factorization.

42442789357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3891598.

The product of its digits is 13547520, while the sum is 55.

The spelling of 42442789357 in words is "forty-two billion, four hundred forty-two million, seven hundred eighty-nine thousand, three hundred fifty-seven".