42449387823 has 8 divisors (see below), whose sum is σ = 62887982000. Its totient is φ = 28299591864.

The previous prime is 42449387819. The next prime is 42449387867. The reversal of 42449387823 is 32878394424.

42449387823 is a `hidden beast` number, since 42 + 449 + 3 + 87 + 82 + 3 = 666.

It is not a de Polignac number, because 42449387823 - 2² = 42449387819 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 42449387823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42449387803) 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 in 7 ways as a sum of consecutive naturals, for example, 786099748 + ... + 786099801.

It is an arithmetic number, because the mean of its divisors is an integer number (7860997750).

Almost surely, 2^42449387823 is an apocalyptic number.

42449387823 is a deficient number, since it is larger than the sum of its proper divisors (20438594177).

42449387823 is a wasteful number, since it uses less digits than its factorization.

42449387823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572199558 (or 1572199552 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 54.

The spelling of 42449387823 in words is "forty-two billion, four hundred forty-nine million, three hundred eighty-seven thousand, eight hundred twenty-three".