87636622663687 has 2 divisors, whose sum is σ = 87636622663688. Its totient is φ = 87636622663686.

The previous prime is 87636622663669. The next prime is 87636622663789. The reversal of 87636622663687 is 78636622663678.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87636622663687 - 2⁷ = 87636622663559 is a prime.

It is a super-2 number, since 2×87636622663687² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87636622663637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43818311331843 + 43818311331844.

It is an arithmetic number, because the mean of its divisors is an integer number (43818311331844).

Almost surely, 2^{87636622663687} is an apocalyptic number.

87636622663687 is a deficient number, since it is larger than the sum of its proper divisors (1).

87636622663687 is an equidigital number, since it uses as much as digits as its factorization.

87636622663687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5267275776, while the sum is 76.

Subtracting from 87636622663687 its reverse (78636622663678), we obtain a palindrome (9000000000009).

The spelling of 87636622663687 in words is "eighty-seven trillion, six hundred thirty-six billion, six hundred twenty-two million, six hundred sixty-three thousand, six hundred eighty-seven".