642558612299 has 2 divisors, whose sum is σ = 642558612300. Its totient is φ = 642558612298.

The previous prime is 642558612247. The next prime is 642558612329. The reversal of 642558612299 is 992216855246.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-642558612299 is a prime.

It is not a weakly prime, because it can be changed into another prime (642558612799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321279306149 + 321279306150.

It is an arithmetic number, because the mean of its divisors is an integer number (321279306150).

Almost surely, 2^642558612299 is an apocalyptic number.

642558612299 is a deficient number, since it is larger than the sum of its proper divisors (1).

642558612299 is an equidigital number, since it uses as much as digits as its factorization.

642558612299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18662400, while the sum is 59.

The spelling of 642558612299 in words is "six hundred forty-two billion, five hundred fifty-eight million, six hundred twelve thousand, two hundred ninety-nine".