180494973409 has 27 divisors (see below), whose sum is σ = 195164557497. Its totient is φ = 166893496704.

The previous prime is 180494973389. The next prime is 180494973427. The reversal of 180494973409 is 904379494081.

The square root of 180494973409 is 424847.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 19966537809 + 160528435600 = 141303^2 + 400660^2 .

It is not a de Polignac number, because 180494973409 - 2⁹ = 180494972897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180494973479) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 483900547 + ... + 483900919.

Almost surely, 2^180494973409 is an apocalyptic number.

180494973409 is the 424847-th square number.

180494973409 is the 212424-th centered octagonal number.

It is an amenable number.

180494973409 is a deficient number, since it is larger than the sum of its proper divisors (14669584088).

180494973409 is an frugal number, since it uses more digits than its factorization.

180494973409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914 (or 457 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 58.

The spelling of 180494973409 in words is "one hundred eighty billion, four hundred ninety-four million, nine hundred seventy-three thousand, four hundred nine".