642634604207 has 2 divisors, whose sum is σ = 642634604208. Its totient is φ = 642634604206.

The previous prime is 642634604201. The next prime is 642634604257. The reversal of 642634604207 is 702406436246.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 642634604207 - 2⁴ = 642634604191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642634604201) 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, 321317302103 + 321317302104.

It is an arithmetic number, because the mean of its divisors is an integer number (321317302104).

Almost surely, 2^642634604207 is an apocalyptic number.

642634604207 is a deficient number, since it is larger than the sum of its proper divisors (1).

642634604207 is an equidigital number, since it uses as much as digits as its factorization.

642634604207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 44.

The spelling of 642634604207 in words is "six hundred forty-two billion, six hundred thirty-four million, six hundred four thousand, two hundred seven".