18181656348 has 12 divisors (see below), whose sum is σ = 42423864840. Its totient is φ = 6060552112.

The previous prime is 18181656347. The next prime is 18181656397. The reversal of 18181656348 is 84365618181.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-4 number, since 4×18181656348⁴ (a number of 42 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18181656348.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18181656347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 757569003 + ... + 757569026.

It is an arithmetic number, because the mean of its divisors is an integer number (3535322070).

Almost surely, 2^18181656348 is an apocalyptic number.

It is an amenable number.

18181656348 is an abundant number, since it is smaller than the sum of its proper divisors (24242208492).

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

18181656348 is a wasteful number, since it uses less digits than its factorization.

18181656348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515138036 (or 1515138034 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 51.

The spelling of 18181656348 in words is "eighteen billion, one hundred eighty-one million, six hundred fifty-six thousand, three hundred forty-eight".