181278482013 has 24 divisors (see below), whose sum is σ = 279044782848. Its totient is φ = 113138337312.

The previous prime is 181278482009. The next prime is 181278482017. The reversal of 181278482013 is 310284872181.

It is an interprime number because it is at equal distance from previous prime (181278482009) and next prime (181278482017).

It is not a de Polignac number, because 181278482013 - 2² = 181278482009 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 181278482013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181278482017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9306670 + ... + 9326127.

It is an arithmetic number, because the mean of its divisors is an integer number (11626865952).

Almost surely, 2^181278482013 is an apocalyptic number.

It is an amenable number.

181278482013 is a deficient number, since it is larger than the sum of its proper divisors (97766300835).

181278482013 is a wasteful number, since it uses less digits than its factorization.

181278482013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18632873 (or 18632870 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 45.

The spelling of 181278482013 in words is "one hundred eighty-one billion, two hundred seventy-eight million, four hundred eighty-two thousand, thirteen".