42431621813 has 16 divisors (see below), whose sum is σ = 48867926016. Its totient is φ = 36090033840.

The previous prime is 42431621741. The next prime is 42431621833. The reversal of 42431621813 is 31812613424.

It is not a de Polignac number, because 42431621813 - 2¹⁸ = 42431359669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42431621833) 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 15 ways as a sum of consecutive naturals, for example, 441770 + ... + 529172.

It is an arithmetic number, because the mean of its divisors is an integer number (3054245376).

Almost surely, 2^42431621813 is an apocalyptic number.

It is an amenable number.

42431621813 is a deficient number, since it is larger than the sum of its proper divisors (6436304203).

42431621813 is a wasteful number, since it uses less digits than its factorization.

42431621813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87944.

The product of its digits is 27648, while the sum is 35.

The spelling of 42431621813 in words is "forty-two billion, four hundred thirty-one million, six hundred twenty-one thousand, eight hundred thirteen".