42891788594 has 4 divisors (see below), whose sum is σ = 64337682894. Its totient is φ = 21445894296.

The previous prime is 42891788591. The next prime is 42891788617. The reversal of 42891788594 is 49588719824.

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

It can be written as a sum of positive squares in only one way, i.e., 23054474569 + 19837314025 = 151837^2 + 140845^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42891788594.

It is not an unprimeable number, because it can be changed into a prime (42891788591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10722947147 + ... + 10722947150.

Almost surely, 2^42891788594 is an apocalyptic number.

42891788594 is a deficient number, since it is larger than the sum of its proper divisors (21445894300).

42891788594 is a wasteful number, since it uses less digits than its factorization.

42891788594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21445894299.

The product of its digits is 46448640, while the sum is 65.

The spelling of 42891788594 in words is "forty-two billion, eight hundred ninety-one million, seven hundred eighty-eight thousand, five hundred ninety-four".