45109745 has 4 divisors (see below), whose sum is σ = 54131700. Its totient is φ = 36087792.

The previous prime is 45109741. The next prime is 45109763. The reversal of 45109745 is 54790154.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54790154 = 2 ⋅27395077.

It can be written as a sum of positive squares in 2 ways, for example, as 5053504 + 40056241 = 2248^2 + 6329^2 .

It is a cyclic number.

It is not a de Polignac number, because 45109745 - 2² = 45109741 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45109741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4510970 + ... + 4510979.

It is an arithmetic number, because the mean of its divisors is an integer number (13532925).

Almost surely, 2^45109745 is an apocalyptic number.

It is an amenable number.

45109745 is a deficient number, since it is larger than the sum of its proper divisors (9021955).

45109745 is an equidigital number, since it uses as much as digits as its factorization.

45109745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9021954.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 45109745 is about 6716.3788606659. The cubic root of 45109745 is about 355.9782447885.

Adding to 45109745 its reverse (54790154), we get a palindrome (99899899).

It can be divided in two parts, 45109 and 745, that added together give a palindrome (45854).

The spelling of 45109745 in words is "forty-five million, one hundred nine thousand, seven hundred forty-five".