642041140243 has 2 divisors, whose sum is σ = 642041140244. Its totient is φ = 642041140242.

The previous prime is 642041140199. The next prime is 642041140267. The reversal of 642041140243 is 342041140246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 642041140243 - 2²⁹ = 641504269331 is a prime.

It is not a weakly prime, because it can be changed into another prime (642041540243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321020570121 + 321020570122.

It is an arithmetic number, because the mean of its divisors is an integer number (321020570122).

Almost surely, 2^642041140243 is an apocalyptic number.

642041140243 is a deficient number, since it is larger than the sum of its proper divisors (1).

642041140243 is an equidigital number, since it uses as much as digits as its factorization.

642041140243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 642041140243 its reverse (342041140246), we get a palindrome (984082280489).

The spelling of 642041140243 in words is "six hundred forty-two billion, forty-one million, one hundred forty thousand, two hundred forty-three".