18318277103616 has 624 divisors, whose sum is σ = 64807441530624. Its totient is φ = 4870875119616.

The previous prime is 18318277103603. The next prime is 18318277103629. The reversal of 18318277103616 is 61630177281381.

18318277103616 is a `hidden beast` number, since 1 + 8 + 3 + 1 + 8 + 2 + 7 + 7 + 10 + 3 + 616 = 666.

It is an interprime number because it is at equal distance from previous prime (18318277103603) and next prime (18318277103629).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 219557140 + ... + 219640556.

It is an arithmetic number, because the mean of its divisors is an integer number (103858079376).

Almost surely, 2^{18318277103616} is an apocalyptic number.

18318277103616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18318277103616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32403720765312).

18318277103616 is an abundant number, since it is smaller than the sum of its proper divisors (46489164427008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18318277103616 is a wasteful number, since it uses less digits than its factorization.

18318277103616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83514 (or 83489 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The spelling of 18318277103616 in words is "eighteen trillion, three hundred eighteen billion, two hundred seventy-seven million, one hundred three thousand, six hundred sixteen".