642102263167 has 2 divisors, whose sum is σ = 642102263168. Its totient is φ = 642102263166.

The previous prime is 642102263057. The next prime is 642102263191. The reversal of 642102263167 is 761362201246.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-642102263167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642102266167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321051131583 + 321051131584.

It is an arithmetic number, because the mean of its divisors is an integer number (321051131584).

Almost surely, 2^642102263167 is an apocalyptic number.

642102263167 is a deficient number, since it is larger than the sum of its proper divisors (1).

642102263167 is an equidigital number, since it uses as much as digits as its factorization.

642102263167 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 642102263167 in words is "six hundred forty-two billion, one hundred two million, two hundred sixty-three thousand, one hundred sixty-seven".