18101115659808 has 96 divisors (see below), whose sum is σ = 54497982712320. Its totient is φ = 5839069559040.

The previous prime is 18101115659807. The next prime is 18101115659813. The reversal of 18101115659808 is 80895651110181.

18101115659808 is a `hidden beast` number, since 18 + 10 + 11 + 15 + 6 + 598 + 0 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (18101115659807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337882335 + ... + 337935902.

It is an arithmetic number, because the mean of its divisors is an integer number (567687319920).

Almost surely, 2^{18101115659808} is an apocalyptic number.

18101115659808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18101115659808 is an abundant number, since it is smaller than the sum of its proper divisors (36396867052512).

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

18101115659808 is a wasteful number, since it uses less digits than its factorization.

18101115659808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675818287 (or 675818273 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 54.

Adding to 18101115659808 its reverse (80895651110181), we get a palindrome (98996766769989).

The spelling of 18101115659808 in words is "eighteen trillion, one hundred one billion, one hundred fifteen million, six hundred fifty-nine thousand, eight hundred eight".