181538695060 has 12 divisors (see below), whose sum is σ = 381231259668. Its totient is φ = 72615478016.

The previous prime is 181538695033. The next prime is 181538695061. The reversal of 181538695060 is 60596835181.

It can be written as a sum of positive squares in 2 ways, for example, as 18634434064 + 162904260996 = 136508^2 + 403614^2 .

It is a junction number, because it is equal to n+sod(n) for n = 181538694989 and 181538695007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181538695061) 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, 4538467357 + ... + 4538467396.

It is an arithmetic number, because the mean of its divisors is an integer number (31769271639).

Almost surely, 2^181538695060 is an apocalyptic number.

181538695060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181538695060 is an abundant number, since it is smaller than the sum of its proper divisors (199692564608).

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

181538695060 is a wasteful number, since it uses less digits than its factorization.

181538695060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9076934762 (or 9076934760 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 52.

The spelling of 181538695060 in words is "one hundred eighty-one billion, five hundred thirty-eight million, six hundred ninety-five thousand, sixty".