18155225088 has 960 divisors, whose sum is σ = 73985264640. Its totient is φ = 4246732800.

The previous prime is 18155225069. The next prime is 18155225119. The reversal of 18155225088 is 88052255181.

18155225088 is a `hidden beast` number, since 18 + 1 + 552 + 2 + 5 + 0 + 88 = 666.

It is a super-2 number, since 2×18155225088² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 442810348 + ... + 442810388.

It is an arithmetic number, because the mean of its divisors is an integer number (77067984).

Almost surely, 2^18155225088 is an apocalyptic number.

18155225088 is a gapful number since it is divisible by the number (18) 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 18155225088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36992632320).

18155225088 is an abundant number, since it is smaller than the sum of its proper divisors (55830039552).

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

18155225088 is a wasteful number, since it uses less digits than its factorization.

18155225088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 256000, while the sum is 45.

The spelling of 18155225088 in words is "eighteen billion, one hundred fifty-five million, two hundred twenty-five thousand, eighty-eight".