18313629781716 has 216 divisors, whose sum is σ = 48691431826856. Its totient is φ = 6026059100160.

The previous prime is 18313629781693. The next prime is 18313629781763. The reversal of 18313629781716 is 61718792631381.

18313629781716 is a `hidden beast` number, since 1 + 8 + 31 + 362 + 9 + 78 + 171 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2474391920400 + 15839237861316 = 1573020^2 + 3979854^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1010621136 + ... + 1010639256.

Almost surely, 2^{18313629781716} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18313629781716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24345715913428).

18313629781716 is an abundant number, since it is smaller than the sum of its proper divisors (30377802045140).

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

18313629781716 is an equidigital number, since it uses as much as digits as its factorization.

18313629781716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18643 (or 18620 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 63.

The spelling of 18313629781716 in words is "eighteen trillion, three hundred thirteen billion, six hundred twenty-nine million, seven hundred eighty-one thousand, seven hundred sixteen".