642041140267 has 2 divisors, whose sum is σ = 642041140268. Its totient is φ = 642041140266.

The previous prime is 642041140243. The next prime is 642041140277. The reversal of 642041140267 is 762041140246.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-642041140267 is a prime.

It is not a weakly prime, because it can be changed into another prime (642041140277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321020570133 + 321020570134.

It is an arithmetic number, because the mean of its divisors is an integer number (321020570134).

Almost surely, 2^642041140267 is an apocalyptic number.

642041140267 is a deficient number, since it is larger than the sum of its proper divisors (1).

642041140267 is an equidigital number, since it uses as much as digits as its factorization.

642041140267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 37.

The spelling of 642041140267 in words is "six hundred forty-two billion, forty-one million, one hundred forty thousand, two hundred sixty-seven".