642706605179 has 2 divisors, whose sum is σ = 642706605180. Its totient is φ = 642706605178.

The previous prime is 642706605161. The next prime is 642706605223. The reversal of 642706605179 is 971506607246.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 642706605179 - 2³² = 638411637883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 642706605179.

It is not a weakly prime, because it can be changed into another prime (642706605139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321353302589 + 321353302590.

It is an arithmetic number, because the mean of its divisors is an integer number (321353302590).

Almost surely, 2^642706605179 is an apocalyptic number.

642706605179 is a deficient number, since it is larger than the sum of its proper divisors (1).

642706605179 is an equidigital number, since it uses as much as digits as its factorization.

642706605179 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3810240, while the sum is 53.

The spelling of 642706605179 in words is "six hundred forty-two billion, seven hundred six million, six hundred five thousand, one hundred seventy-nine".