87638446663 has 2 divisors, whose sum is σ = 87638446664. Its totient is φ = 87638446662.

The previous prime is 87638446661. The next prime is 87638446757. The reversal of 87638446663 is 36664483678.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87638446663 - 2¹ = 87638446661 is a prime.

Together with 87638446661, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87638446661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43819223331 + 43819223332.

It is an arithmetic number, because the mean of its divisors is an integer number (43819223332).

Almost surely, 2^87638446663 is an apocalyptic number.

87638446663 is a deficient number, since it is larger than the sum of its proper divisors (1).

87638446663 is an equidigital number, since it uses as much as digits as its factorization.

87638446663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 83607552, while the sum is 61.

The spelling of 87638446663 in words is "eighty-seven billion, six hundred thirty-eight million, four hundred forty-six thousand, six hundred sixty-three".