181845360085 has 8 divisors (see below), whose sum is σ = 223536735576. Its totient is φ = 141928085760.

The previous prime is 181845360049. The next prime is 181845360089. The reversal of 181845360085 is 580063548181.

It can be written as a sum of positive squares in 4 ways, for example, as 7716919716 + 174128440369 = 87846^2 + 417287^2 .

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

It is not a de Polignac number, because 181845360085 - 2¹⁹ = 181844835797 is a prime.

It is a super-2 number, since 2×181845360085² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181845360089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 443525064 + ... + 443525473.

It is an arithmetic number, because the mean of its divisors is an integer number (27942091947).

Almost surely, 2^181845360085 is an apocalyptic number.

It is an amenable number.

181845360085 is a deficient number, since it is larger than the sum of its proper divisors (41691375491).

181845360085 is an equidigital number, since it uses as much as digits as its factorization.

181845360085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887050583.

The product of its (nonzero) digits is 921600, while the sum is 49.

The spelling of 181845360085 in words is "one hundred eighty-one billion, eight hundred forty-five million, three hundred sixty thousand, eighty-five".