180981215911 has 2 divisors, whose sum is σ = 180981215912. Its totient is φ = 180981215910.

The previous prime is 180981215897. The next prime is 180981215969. The reversal of 180981215911 is 119512189081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 180981215911 - 2⁵ = 180981215879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180981215711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90490607955 + 90490607956.

It is an arithmetic number, because the mean of its divisors is an integer number (90490607956).

Almost surely, 2^180981215911 is an apocalyptic number.

180981215911 is a deficient number, since it is larger than the sum of its proper divisors (1).

180981215911 is an equidigital number, since it uses as much as digits as its factorization.

180981215911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 46.

The spelling of 180981215911 in words is "one hundred eighty billion, nine hundred eighty-one million, two hundred fifteen thousand, nine hundred eleven".