9988390165486 has 16 divisors (see below), whose sum is σ = 15637200141600. Its totient is φ = 4776078955648.

The previous prime is 9988390165459. The next prime is 9988390165511. The reversal of 9988390165486 is 6845610938899.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21981991 + ... + 22431778.

It is an arithmetic number, because the mean of its divisors is an integer number (977325008850).

Almost surely, 2^{9988390165486} is an apocalyptic number.

9988390165486 is a deficient number, since it is larger than the sum of its proper divisors (5648809976114).

9988390165486 is a wasteful number, since it uses less digits than its factorization.

9988390165486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44418683.

The product of its (nonzero) digits is 806215680, while the sum is 76.

The spelling of 9988390165486 in words is "nine trillion, nine hundred eighty-eight billion, three hundred ninety million, one hundred sixty-five thousand, four hundred eighty-six".