998310608685 has 144 divisors (see below), whose sum is σ = 1978424360640. Its totient is φ = 464179921920.

The previous prime is 998310608681. The next prime is 998310608747. The reversal of 998310608685 is 586806013899.

998310608685 is a `hidden beast` number, since 9 + 9 + 8 + 3 + 10 + 608 + 6 + 8 + 5 = 666.

It is not a de Polignac number, because 998310608685 - 2² = 998310608681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998310608681) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 47817409 + ... + 47838281.

It is an arithmetic number, because the mean of its divisors is an integer number (13739058060).

Almost surely, 2^998310608685 is an apocalyptic number.

998310608685 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

998310608685 is a deficient number, since it is larger than the sum of its proper divisors (980113751955).

998310608685 is a wasteful number, since it uses less digits than its factorization.

998310608685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21260 (or 21244 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 63.

The spelling of 998310608685 in words is "nine hundred ninety-eight billion, three hundred ten million, six hundred eight thousand, six hundred eighty-five".