18198506544480 has 288 divisors, whose sum is σ = 66965368710240. Its totient is φ = 4485382594560.

The previous prime is 18198506544469. The next prime is 18198506544481. The reversal of 18198506544480 is 8444560589181.

It is a happy number.

18198506544480 is a `hidden beast` number, since 1 + 8 + 1 + 9 + 8 + 5 + 0 + 6 + 544 + 4 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18198506544481) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6989827 + ... + 9233346.

It is an arithmetic number, because the mean of its divisors is an integer number (232518641355).

Almost surely, 2^{18198506544480} is an apocalyptic number.

18198506544480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18198506544480 is an abundant number, since it is smaller than the sum of its proper divisors (48766862165760).

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

18198506544480 is a wasteful number, since it uses less digits than its factorization.

18198506544480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16223254 (or 16223243 counting only the distinct ones).

The product of its (nonzero) digits is 44236800, while the sum is 63.

The spelling of 18198506544480 in words is "eighteen trillion, one hundred ninety-eight billion, five hundred six million, five hundred forty-four thousand, four hundred eighty".