1642235041687 has 2 divisors, whose sum is σ = 1642235041688. Its totient is φ = 1642235041686.

The previous prime is 1642235041549. The next prime is 1642235041691. The reversal of 1642235041687 is 7861405322461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1642235041687 - 2²⁷ = 1642100823959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1642235041687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1642235041697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821117520843 + 821117520844.

It is an arithmetic number, because the mean of its divisors is an integer number (821117520844).

Almost surely, 2^{1642235041687} is an apocalyptic number.

1642235041687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642235041687 is an equidigital number, since it uses as much as digits as its factorization.

1642235041687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1935360, while the sum is 49.

The spelling of 1642235041687 in words is "one trillion, six hundred forty-two billion, two hundred thirty-five million, forty-one thousand, six hundred eighty-seven".