181365545 has 8 divisors (see below), whose sum is σ = 229093440. Its totient is φ = 137455920.

The previous prime is 181365539. The next prime is 181365553. The reversal of 181365545 is 545563181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 181365545 - 2¹² = 181361449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 181365499 and 181365508.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 954461 + ... + 954650.

It is an arithmetic number, because the mean of its divisors is an integer number (28636680).

Almost surely, 2^181365545 is an apocalyptic number.

It is an amenable number.

181365545 is a deficient number, since it is larger than the sum of its proper divisors (47727895).

181365545 is a wasteful number, since it uses less digits than its factorization.

181365545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909135.

The product of its digits is 72000, while the sum is 38.

The square root of 181365545 is about 13467.2025677198. The cubic root of 181365545 is about 566.0458296744.

The spelling of 181365545 in words is "one hundred eighty-one million, three hundred sixty-five thousand, five hundred forty-five".