18155551350 has 96 divisors (see below), whose sum is σ = 45646364160. Its totient is φ = 4775155840.

The previous prime is 18155551339. The next prime is 18155551363. The reversal of 18155551350 is 5315555181.

It is a junction number, because it is equal to n+sod(n) for n = 18155551299 and 18155551308.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3833584 + ... + 3838316.

It is an arithmetic number, because the mean of its divisors is an integer number (475482960).

Almost surely, 2^18155551350 is an apocalyptic number.

18155551350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18155551350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22823182080).

18155551350 is an abundant number, since it is smaller than the sum of its proper divisors (27490812810).

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

18155551350 is a wasteful number, since it uses less digits than its factorization.

18155551350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5094 (or 5089 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 39.

The spelling of 18155551350 in words is "eighteen billion, one hundred fifty-five million, five hundred fifty-one thousand, three hundred fifty".