32181394129 has 2 divisors, whose sum is σ = 32181394130. Its totient is φ = 32181394128.

The previous prime is 32181394123. The next prime is 32181394199. The reversal of 32181394129 is 92149318123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18644537025 + 13536857104 = 136545^2 + 116348^2 .

It is an emirp because it is prime and its reverse (92149318123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32181394129 - 2²⁹ = 31644523217 is a prime.

It is not a weakly prime, because it can be changed into another prime (32181394123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16090697064 + 16090697065.

It is an arithmetic number, because the mean of its divisors is an integer number (16090697065).

Almost surely, 2^32181394129 is an apocalyptic number.

It is an amenable number.

32181394129 is a deficient number, since it is larger than the sum of its proper divisors (1).

32181394129 is an equidigital number, since it uses as much as digits as its factorization.

32181394129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 43.

The spelling of 32181394129 in words is "thirty-two billion, one hundred eighty-one million, three hundred ninety-four thousand, one hundred twenty-nine".