642248622073 has 2 divisors, whose sum is σ = 642248622074. Its totient is φ = 642248622072.

The previous prime is 642248622023. The next prime is 642248622107. The reversal of 642248622073 is 370226842246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 472349674729 + 169898947344 = 687277^2 + 412188^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-642248622073 is a prime.

It is not a weakly prime, because it can be changed into another prime (642248622023) 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, 321124311036 + 321124311037.

It is an arithmetic number, because the mean of its divisors is an integer number (321124311037).

Almost surely, 2^642248622073 is an apocalyptic number.

It is an amenable number.

642248622073 is a deficient number, since it is larger than the sum of its proper divisors (1).

642248622073 is an equidigital number, since it uses as much as digits as its factorization.

642248622073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1548288, while the sum is 46.

The spelling of 642248622073 in words is "six hundred forty-two billion, two hundred forty-eight million, six hundred twenty-two thousand, seventy-three".