42815693189 has 4 divisors (see below), whose sum is σ = 43972874124. Its totient is φ = 41658512256.

The previous prime is 42815693161. The next prime is 42815693191. The reversal of 42815693189 is 98139651824.

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 15667528900 + 27148164289 = 125170^2 + 164767^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42815693189 is a prime.

It is a super-3 number, since 3×42815693189³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42815695189) 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, 578590412 + ... + 578590485.

It is an arithmetic number, because the mean of its divisors is an integer number (10993218531).

Almost surely, 2^42815693189 is an apocalyptic number.

It is an amenable number.

42815693189 is a deficient number, since it is larger than the sum of its proper divisors (1157180935).

42815693189 is a wasteful number, since it uses less digits than its factorization.

42815693189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157180934.

The product of its digits is 3732480, while the sum is 56.

The spelling of 42815693189 in words is "forty-two billion, eight hundred fifteen million, six hundred ninety-three thousand, one hundred eighty-nine".