18451709061696 has 168 divisors, whose sum is σ = 56207765161080. Its totient is φ = 5767251050496.

The previous prime is 18451709061601. The next prime is 18451709061707. The reversal of 18451709061696 is 69616090715481.

18451709061696 is a `hidden beast` number, since 1 + 8 + 4 + 5 + 1 + 7 + 0 + 9 + 0 + 616 + 9 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2298061956096 + 16153647105600 = 1515936^2 + 4019160^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 868491 + ... + 6136586.

Almost surely, 2^{18451709061696} is an apocalyptic number.

18451709061696 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 18451709061696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28103882580540).

18451709061696 is an abundant number, since it is smaller than the sum of its proper divisors (37756056099384).

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

18451709061696 is a wasteful number, since it uses less digits than its factorization.

18451709061696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7005381 (or 7005368 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 63.

The spelling of 18451709061696 in words is "eighteen trillion, four hundred fifty-one billion, seven hundred nine million, sixty-one thousand, six hundred ninety-six".