181341648729 has 12 divisors (see below), whose sum is σ = 270970280100. Its totient is φ = 116725658784.

The previous prime is 181341648727. The next prime is 181341648737. The reversal of 181341648729 is 927846143181.

181341648729 is a `hidden beast` number, since 1 + 8 + 134 + 1 + 6 + 487 + 29 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 144430401600 + 36911247129 = 380040^2 + 192123^2 .

It is not a de Polignac number, because 181341648729 - 2¹ = 181341648727 is a prime.

It is not an unprimeable number, because it can be changed into a prime (181341648727) 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, 347397534 + ... + 347398055.

It is an arithmetic number, because the mean of its divisors is an integer number (22580856675).

Almost surely, 2^181341648729 is an apocalyptic number.

It is an amenable number.

181341648729 is a deficient number, since it is larger than the sum of its proper divisors (89628631371).

181341648729 is a wasteful number, since it uses less digits than its factorization.

181341648729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694795624 (or 694795621 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The spelling of 181341648729 in words is "one hundred eighty-one billion, three hundred forty-one million, six hundred forty-eight thousand, seven hundred twenty-nine".