40431424643 has 4 divisors (see below), whose sum is σ = 40432068048. Its totient is φ = 40430781240.

The previous prime is 40431424639. The next prime is 40431424673. The reversal of 40431424643 is 34642413404.

It is a happy number.

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 40431424643 - 2² = 40431424639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40431424673) 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 3 ways as a sum of consecutive naturals, for example, 215828 + ... + 356993.

It is an arithmetic number, because the mean of its divisors is an integer number (10108017012).

Almost surely, 2^40431424643 is an apocalyptic number.

40431424643 is a deficient number, since it is larger than the sum of its proper divisors (643405).

40431424643 is an equidigital number, since it uses as much as digits as its factorization.

40431424643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643404.

The product of its (nonzero) digits is 110592, while the sum is 35.

The spelling of 40431424643 in words is "forty billion, four hundred thirty-one million, four hundred twenty-four thousand, six hundred forty-three".