18169242660 has 288 divisors, whose sum is σ = 60435359712. Its totient is φ = 4400087040.

The previous prime is 18169242653. The next prime is 18169242667. The reversal of 18169242660 is 6624296181.

18169242660 is a `hidden beast` number, since 1 + 8 + 169 + 2 + 426 + 60 = 666.

It is an interprime number because it is at equal distance from previous prime (18169242653) and next prime (18169242667).

It can be written as a sum of positive squares in 16 ways, for example, as 2926377216 + 15242865444 = 54096^2 + 123462^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (18169242667) 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, 12168874 + ... + 12170366.

It is an arithmetic number, because the mean of its divisors is an integer number (209844999).

Almost surely, 2^18169242660 is an apocalyptic number.

18169242660 is a gapful number since it is divisible by the number (10) 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 18169242660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30217679856).

18169242660 is an abundant number, since it is smaller than the sum of its proper divisors (42266117052).

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

18169242660 is a wasteful number, since it uses less digits than its factorization.

18169242660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663 (or 1658 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 18169242660 in words is "eighteen billion, one hundred sixty-nine million, two hundred forty-two thousand, six hundred sixty".