642441412423 has 32 divisors (see below), whose sum is σ = 725001580800. Its totient is φ = 565659311616.

The previous prime is 642441412373. The next prime is 642441412427. The reversal of 642441412423 is 324214144246.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 642441412423 - 2³⁷ = 505002458951 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 (642441412427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76213773 + ... + 76222201.

It is an arithmetic number, because the mean of its divisors is an integer number (22656299400).

Almost surely, 2^642441412423 is an apocalyptic number.

642441412423 is a deficient number, since it is larger than the sum of its proper divisors (82560168377).

642441412423 is a wasteful number, since it uses less digits than its factorization.

642441412423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11391.

The product of its digits is 147456, while the sum is 37.

Adding to 642441412423 its reverse (324214144246), we get a palindrome (966655556669).

The spelling of 642441412423 in words is "six hundred forty-two billion, four hundred forty-one million, four hundred twelve thousand, four hundred twenty-three".