642675577207 has 2 divisors, whose sum is σ = 642675577208. Its totient is φ = 642675577206.

The previous prime is 642675577199. The next prime is 642675577213. The reversal of 642675577207 is 702775576246.

642675577207 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 642675577207 - 2³ = 642675577199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642675571207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321337788603 + 321337788604.

It is an arithmetic number, because the mean of its divisors is an integer number (321337788604).

Almost surely, 2^642675577207 is an apocalyptic number.

642675577207 is a deficient number, since it is larger than the sum of its proper divisors (1).

642675577207 is an equidigital number, since it uses as much as digits as its factorization.

642675577207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34574400, while the sum is 58.

The spelling of 642675577207 in words is "six hundred forty-two billion, six hundred seventy-five million, five hundred seventy-seven thousand, two hundred seven".