181405045 has 16 divisors (see below), whose sum is σ = 230812848. Its totient is φ = 136396800.

The previous prime is 181405031. The next prime is 181405057. The reversal of 181405045 is 540504181.

It can be written as a sum of positive squares in 8 ways, for example, as 15046641 + 166358404 = 3879^2 + 12898^2 .

It is not a de Polignac number, because 181405045 - 2⁵ = 181405013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101197 + ... + 102973.

It is an arithmetic number, because the mean of its divisors is an integer number (14425803).

Almost surely, 2^181405045 is an apocalyptic number.

It is an amenable number.

181405045 is a deficient number, since it is larger than the sum of its proper divisors (49407803).

181405045 is a wasteful number, since it uses less digits than its factorization.

181405045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3000.

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 181405045 is about 13468.6690136776. The cubic root of 181405045 is about 566.0869201459.

The spelling of 181405045 in words is "one hundred eighty-one million, four hundred five thousand, forty-five".