181382990559907 has 16 divisors (see below), whose sum is σ = 183715026214720. Its totient is φ = 179060452927488.

The previous prime is 181382990559889. The next prime is 181382990559929. The reversal of 181382990559907 is 709955099283181.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181382990559907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181382990559937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 539265658 + ... + 539601904.

It is an arithmetic number, because the mean of its divisors is an integer number (11482189138420).

Almost surely, 2^{181382990559907} is an apocalyptic number.

181382990559907 is a deficient number, since it is larger than the sum of its proper divisors (2332035654813).

181382990559907 is a wasteful number, since it uses less digits than its factorization.

181382990559907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350350.

The product of its (nonzero) digits is 440899200, while the sum is 76.

The spelling of 181382990559907 in words is "one hundred eighty-one trillion, three hundred eighty-two billion, nine hundred ninety million, five hundred fifty-nine thousand, nine hundred seven".