108640045 has 4 divisors (see below), whose sum is σ = 130368060. Its totient is φ = 86912032.

The previous prime is 108640033. The next prime is 108640067. The reversal of 108640045 is 540046801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540046801 = 7 ⋅77149543.

It can be written as a sum of positive squares in 2 ways, for example, as 58201641 + 50438404 = 7629^2 + 7102^2 .

It is a cyclic number.

It is not a de Polignac number, because 108640045 - 2¹⁵ = 108607277 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 108639995 and 108640022.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10864000 + ... + 10864009.

It is an arithmetic number, because the mean of its divisors is an integer number (32592015).

Almost surely, 2^108640045 is an apocalyptic number.

It is an amenable number.

108640045 is a deficient number, since it is larger than the sum of its proper divisors (21728015).

108640045 is an equidigital number, since it uses as much as digits as its factorization.

108640045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21728014.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 108640045 is about 10423.0535353130. The cubic root of 108640045 is about 477.1592115328.

Adding to 108640045 its reverse (540046801), we get a palindrome (648686846).

The spelling of 108640045 in words is "one hundred eight million, six hundred forty thousand, forty-five".