642204043433 has 2 divisors, whose sum is σ = 642204043434. Its totient is φ = 642204043432.

The previous prime is 642204043423. The next prime is 642204043469. The reversal of 642204043433 is 334340402246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 634558814464 + 7645228969 = 796592^2 + 87437^2 .

It is a cyclic number.

It is not a de Polignac number, because 642204043433 - 2⁴ = 642204043417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 642204043393 and 642204043402.

It is not a weakly prime, because it can be changed into another prime (642204043423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321102021716 + 321102021717.

It is an arithmetic number, because the mean of its divisors is an integer number (321102021717).

Almost surely, 2^642204043433 is an apocalyptic number.

It is an amenable number.

642204043433 is a deficient number, since it is larger than the sum of its proper divisors (1).

642204043433 is an equidigital number, since it uses as much as digits as its factorization.

642204043433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 35.

Adding to 642204043433 its reverse (334340402246), we get a palindrome (976544445679).

The spelling of 642204043433 in words is "six hundred forty-two billion, two hundred four million, forty-three thousand, four hundred thirty-three".