642301846009 has 2 divisors, whose sum is σ = 642301846010. Its totient is φ = 642301846008.

The previous prime is 642301845989. The next prime is 642301846031. The reversal of 642301846009 is 900648103246.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 544584961600 + 97716884409 = 737960^2 + 312597^2 .

It is a cyclic number.

It is not a de Polignac number, because 642301846009 - 2¹¹ = 642301843961 is a prime.

It is a super-2 number, since 2×642301846009² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (642301846079) 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, 321150923004 + 321150923005.

It is an arithmetic number, because the mean of its divisors is an integer number (321150923005).

Almost surely, 2^642301846009 is an apocalyptic number.

It is an amenable number.

642301846009 is a deficient number, since it is larger than the sum of its proper divisors (1).

642301846009 is an equidigital number, since it uses as much as digits as its factorization.

642301846009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 43.

The spelling of 642301846009 in words is "six hundred forty-two billion, three hundred one million, eight hundred forty-six thousand, nine".