109541645 has 16 divisors (see below), whose sum is σ = 136540080. Its totient is φ = 84294144.

The previous prime is 109541623. The next prime is 109541651. The reversal of 109541645 is 546145901.

It can be written as a sum of positive squares in 8 ways, for example, as 11095561 + 98446084 = 3331^2 + 9922^2 .

It is a cyclic number.

It is not a de Polignac number, because 109541645 - 2⁸ = 109541389 is a prime.

It is a super-3 number, since 3×109541645³ (a number of 25 digits) contains 333 as substring.

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, 13139 + ... + 19791.

It is an arithmetic number, because the mean of its divisors is an integer number (8533755).

Almost surely, 2^109541645 is an apocalyptic number.

It is an amenable number.

109541645 is a deficient number, since it is larger than the sum of its proper divisors (26998435).

109541645 is an equidigital number, since it uses as much as digits as its factorization.

109541645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6784.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 109541645 is about 10466.2144541377. The cubic root of 109541645 is about 478.4755527633.

The spelling of 109541645 in words is "one hundred nine million, five hundred forty-one thousand, six hundred forty-five".