142640431433605 has 24 divisors (see below), whose sum is σ = 196552673680896. Its totient is φ = 97347023232480.

The previous prime is 142640431433593. The next prime is 142640431433609. The reversal of 142640431433605 is 506334134046241.

It is not a de Polignac number, because 142640431433605 - 2¹⁵ = 142640431400837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142640431433609) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44211637 + ... + 47328106.

It is an arithmetic number, because the mean of its divisors is an integer number (8189694736704).

Almost surely, 2^{142640431433605} is an apocalyptic number.

It is an amenable number.

142640431433605 is a deficient number, since it is larger than the sum of its proper divisors (53912242247291).

142640431433605 is an frugal number, since it uses more digits than its factorization.

142640431433605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91540177 (or 91539966 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 46.

Adding to 142640431433605 its reverse (506334134046241), we get a palindrome (648974565479846).

The spelling of 142640431433605 in words is "one hundred forty-two trillion, six hundred forty billion, four hundred thirty-one million, four hundred thirty-three thousand, six hundred five".