180545481 has 6 divisors (see below), whose sum is σ = 260787930. Its totient is φ = 120363648.

The previous prime is 180545441. The next prime is 180545513. The reversal of 180545481 is 184545081.

It can be written as a sum of positive squares in only one way, i.e., 119705481 + 60840000 = 10941^2 + 7800^2 .

It is not a de Polignac number, because 180545481 - 2¹³ = 180537289 is a prime.

It is a super-2 number, since 2×180545481² = 65193341419042722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (180545441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10030296 + ... + 10030313.

It is an arithmetic number, because the mean of its divisors is an integer number (43464655).

Almost surely, 2^180545481 is an apocalyptic number.

It is an amenable number.

180545481 is a deficient number, since it is larger than the sum of its proper divisors (80242449).

180545481 is a wasteful number, since it uses less digits than its factorization.

180545481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20060615 (or 20060612 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 36.

The square root of 180545481 is about 13436.7213634874. The cubic root of 180545481 is about 565.1913946818.

The spelling of 180545481 in words is "one hundred eighty million, five hundred forty-five thousand, four hundred eighty-one".