642262530370129 has 2 divisors, whose sum is σ = 642262530370130. Its totient is φ = 642262530370128.

The previous prime is 642262530370121. The next prime is 642262530370159. The reversal of 642262530370129 is 921073035262246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 535424983119504 + 106837547250625 = 23139252^2 + 10336225^2 .

It is a cyclic number.

It is not a de Polignac number, because 642262530370129 - 2³ = 642262530370121 is a prime.

It is not a weakly prime, because it can be changed into another prime (642262530370121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321131265185064 + 321131265185065.

It is an arithmetic number, because the mean of its divisors is an integer number (321131265185065).

Almost surely, 2^{642262530370129} is an apocalyptic number.

It is an amenable number.

642262530370129 is a deficient number, since it is larger than the sum of its proper divisors (1).

642262530370129 is an equidigital number, since it uses as much as digits as its factorization.

642262530370129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6531840, while the sum is 52.

The spelling of 642262530370129 in words is "six hundred forty-two trillion, two hundred sixty-two billion, five hundred thirty million, three hundred seventy thousand, one hundred twenty-nine".