42685899903 has 24 divisors (see below), whose sum is σ = 63663075840. Its totient is φ = 27532057680.

The previous prime is 42685899889. The next prime is 42685899937. The reversal of 42685899903 is 30999858624.

42685899903 is a `hidden beast` number, since 42 + 6 + 8 + 589 + 9 + 9 + 0 + 3 = 666.

It is not a de Polignac number, because 42685899903 - 2¹⁷ = 42685768831 is a prime.

It is a super-3 number, since 3×42685899903³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42685899943) 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 23 ways as a sum of consecutive naturals, for example, 1170300 + ... + 1206222.

It is an arithmetic number, because the mean of its divisors is an integer number (2652628160).

Almost surely, 2^42685899903 is an apocalyptic number.

42685899903 is a deficient number, since it is larger than the sum of its proper divisors (20977175937).

42685899903 is a wasteful number, since it uses less digits than its factorization.

42685899903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40219 (or 40216 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 63.

The spelling of 42685899903 in words is "forty-two billion, six hundred eighty-five million, eight hundred ninety-nine thousand, nine hundred three".