42438854887631 has 4 divisors (see below), whose sum is σ = 42438979476000. Its totient is φ = 42438730299264.

The previous prime is 42438854887621. The next prime is 42438854887643. The reversal of 42438854887631 is 13678845883424.

42438854887631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 42438854887631 - 2¹⁰ = 42438854886607 is a prime.

It is a super-2 number, since 2×42438854887631² (a number of 28 digits) contains 22 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 (42438854887621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61781831 + ... + 62464968.

It is an arithmetic number, because the mean of its divisors is an integer number (10609744869000).

Almost surely, 2^{42438854887631} is an apocalyptic number.

42438854887631 is a deficient number, since it is larger than the sum of its proper divisors (124588369).

42438854887631 is a wasteful number, since it uses less digits than its factorization.

42438854887631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124588368.

The product of its digits is 990904320, while the sum is 71.

The spelling of 42438854887631 in words is "forty-two trillion, four hundred thirty-eight billion, eight hundred fifty-four million, eight hundred eighty-seven thousand, six hundred thirty-one".