45505109 has 18 divisors (see below), whose sum is σ = 51611490. Its totient is φ = 40099488.

The previous prime is 45505099. The next prime is 45505123. The reversal of 45505109 is 90150554.

45505109 = T₁₄₂ + T₁₄₃ + ... + T₆₅₀.

It can be written as a sum of positive squares in 3 ways, for example, as 1322500 + 44182609 = 1150^2 + 6647^2 .

It is not a de Polignac number, because 45505109 - 2⁴ = 45505093 is a prime.

It is a super-3 number, since 3×45505109³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45505139) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 89147 + ... + 89655.

It is an arithmetic number, because the mean of its divisors is an integer number (2867305).

Almost surely, 2^45505109 is an apocalyptic number.

It is an amenable number.

45505109 is a deficient number, since it is larger than the sum of its proper divisors (6106381).

45505109 is a wasteful number, since it uses less digits than its factorization.

45505109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581 (or 545 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 45505109 is about 6745.7474752617. The cubic root of 45505109 is about 357.0152106652.

The spelling of 45505109 in words is "forty-five million, five hundred five thousand, one hundred nine".