642510262847 has 2 divisors, whose sum is σ = 642510262848. Its totient is φ = 642510262846.

The previous prime is 642510262753. The next prime is 642510262853. The reversal of 642510262847 is 748262015246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 642510262847 - 2²² = 642506068543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642510762847) 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, 321255131423 + 321255131424.

It is an arithmetic number, because the mean of its divisors is an integer number (321255131424).

Almost surely, 2^642510262847 is an apocalyptic number.

642510262847 is a deficient number, since it is larger than the sum of its proper divisors (1).

642510262847 is an equidigital number, since it uses as much as digits as its factorization.

642510262847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1290240, while the sum is 47.

The spelling of 642510262847 in words is "six hundred forty-two billion, five hundred ten million, two hundred sixty-two thousand, eight hundred forty-seven".