87444307816664 has 16 divisors (see below), whose sum is σ = 164863922889120. Its totient is φ = 43480595046240.

The previous prime is 87444307816661. The next prime is 87444307816693. The reversal of 87444307816664 is 46661870344478.

It is a junction number, because it is equal to n+sod(n) for n = 87444307816594 and 87444307816603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87444307816661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30194856224 + ... + 30194859119.

It is an arithmetic number, because the mean of its divisors is an integer number (10303995180570).

Almost surely, 2^{87444307816664} is an apocalyptic number.

It is an amenable number.

87444307816664 is a deficient number, since it is larger than the sum of its proper divisors (77419615072456).

87444307816664 is a wasteful number, since it uses less digits than its factorization.

87444307816664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60389715530 (or 60389715526 counting only the distinct ones).

The product of its (nonzero) digits is 520224768, while the sum is 68.

The spelling of 87444307816664 in words is "eighty-seven trillion, four hundred forty-four billion, three hundred seven million, eight hundred sixteen thousand, six hundred sixty-four".