181003515345 has 12 divisors (see below), whose sum is σ = 313739426676. Its totient is φ = 96535208160.

The previous prime is 181003515299. The next prime is 181003515347. The reversal of 181003515345 is 543515300181.

It is a happy number.

181003515345 is a `hidden beast` number, since 1 + 8 + 100 + 3 + 515 + 34 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 88094988864 + 92908526481 = 296808^2 + 304809^2 .

It is not a de Polignac number, because 181003515345 - 2⁹ = 181003514833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (181003515347) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2011150126 + ... + 2011150215.

It is an arithmetic number, because the mean of its divisors is an integer number (26144952223).

Almost surely, 2^181003515345 is an apocalyptic number.

181003515345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

181003515345 is a deficient number, since it is larger than the sum of its proper divisors (132735911331).

181003515345 is a wasteful number, since it uses less digits than its factorization.

181003515345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4022300352 (or 4022300349 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The spelling of 181003515345 in words is "one hundred eighty-one billion, three million, five hundred fifteen thousand, three hundred forty-five".