180898371749 has 2 divisors, whose sum is σ = 180898371750. Its totient is φ = 180898371748.

The previous prime is 180898371739. The next prime is 180898371793. The reversal of 180898371749 is 947173898081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179951578849 + 946792900 = 424207^2 + 30770^2 .

It is an emirp because it is prime and its reverse (947173898081) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-180898371749 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180898371739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90449185874 + 90449185875.

It is an arithmetic number, because the mean of its divisors is an integer number (90449185875).

Almost surely, 2^180898371749 is an apocalyptic number.

It is an amenable number.

180898371749 is a deficient number, since it is larger than the sum of its proper divisors (1).

180898371749 is an equidigital number, since it uses as much as digits as its factorization.

180898371749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24385536, while the sum is 65.

It can be divided in two parts, 18089 and 8371749, that added together give a palindrome (8389838).

The spelling of 180898371749 in words is "one hundred eighty billion, eight hundred ninety-eight million, three hundred seventy-one thousand, seven hundred forty-nine".