42835820069809 has 4 divisors (see below), whose sum is σ = 46130883152116. Its totient is φ = 39540756987504.

The previous prime is 42835820069723. The next prime is 42835820069813. The reversal of 42835820069809 is 90896002853824.

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 9686691399025 + 33149128670784 = 3112345^2 + 5757528^2 .

It is a cyclic number.

It is not a de Polignac number, because 42835820069809 - 2⁹ = 42835820069297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42835820069509) 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, 1647531541134 + ... + 1647531541159.

It is an arithmetic number, because the mean of its divisors is an integer number (11532720788029).

Almost surely, 2^{42835820069809} is an apocalyptic number.

It is an amenable number.

42835820069809 is a deficient number, since it is larger than the sum of its proper divisors (3295063082307).

42835820069809 is a wasteful number, since it uses less digits than its factorization.

42835820069809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3295063082306.

The product of its (nonzero) digits is 59719680, while the sum is 64.

The spelling of 42835820069809 in words is "forty-two trillion, eight hundred thirty-five billion, eight hundred twenty million, sixty-nine thousand, eight hundred nine".