18119659865472 has 768 divisors, whose sum is σ = 60083844387840. Its totient is φ = 5389203456000.

The previous prime is 18119659865401. The next prime is 18119659865473. The reversal of 18119659865472 is 27456895691181.

18119659865472 is a `hidden beast` number, since 1 + 8 + 1 + 1 + 9 + 6 + 5 + 98 + 65 + 472 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 18119659865472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18119659865473) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 19013283748 + ... + 19013284700.

It is an arithmetic number, because the mean of its divisors is an integer number (78234172380).

Almost surely, 2^{18119659865472} is an apocalyptic number.

18119659865472 is a gapful number since it is divisible by the number (12) 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 18119659865472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30041922193920).

18119659865472 is an abundant number, since it is smaller than the sum of its proper divisors (41964184522368).

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

18119659865472 is an equidigital number, since it uses as much as digits as its factorization.

18119659865472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1965 (or 1941 counting only the distinct ones).

The product of its digits is 261273600, while the sum is 72.

The spelling of 18119659865472 in words is "eighteen trillion, one hundred nineteen billion, six hundred fifty-nine million, eight hundred sixty-five thousand, four hundred seventy-two".