180634000549 has 2 divisors, whose sum is σ = 180634000550. Its totient is φ = 180634000548.

The previous prime is 180634000543. The next prime is 180634000601. The reversal of 180634000549 is 945000436081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104467936225 + 76166064324 = 323215^2 + 275982^2 .

It is a cyclic number.

It is not a de Polignac number, because 180634000549 - 2³ = 180634000541 is a prime.

It is a super-2 number, since 2×180634000549² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180634000541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90317000274 + 90317000275.

It is an arithmetic number, because the mean of its divisors is an integer number (90317000275).

Almost surely, 2^180634000549 is an apocalyptic number.

It is an amenable number.

180634000549 is a deficient number, since it is larger than the sum of its proper divisors (1).

180634000549 is an equidigital number, since it uses as much as digits as its factorization.

180634000549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 180634000549 in words is "one hundred eighty billion, six hundred thirty-four million, five hundred forty-nine", and thus it is an aban number.