642510762847 has 2 divisors, whose sum is σ = 642510762848. Its totient is φ = 642510762846.

The previous prime is 642510762821. The next prime is 642510762853. The reversal of 642510762847 is 748267015246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 642510762847 - 2³⁹ = 92754948959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 642510762794 and 642510762803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642510762877) 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, 321255381423 + 321255381424.

It is an arithmetic number, because the mean of its divisors is an integer number (321255381424).

Almost surely, 2^642510762847 is an apocalyptic number.

642510762847 is a deficient number, since it is larger than the sum of its proper divisors (1).

642510762847 is an equidigital number, since it uses as much as digits as its factorization.

642510762847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4515840, while the sum is 52.

The spelling of 642510762847 in words is "six hundred forty-two billion, five hundred ten million, seven hundred sixty-two thousand, eight hundred forty-seven".