109061561 has 16 divisors (see below), whose sum is σ = 131079168. Its totient is φ = 88717200.

The previous prime is 109061551. The next prime is 109061567. The reversal of 109061561 is 165160901.

It is a cyclic number.

It is not a de Polignac number, because 109061561 - 2⁶ = 109061497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109061567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18506 + ... + 23676.

It is an arithmetic number, because the mean of its divisors is an integer number (8192448).

Almost surely, 2^109061561 is an apocalyptic number.

It is an amenable number.

109061561 is a deficient number, since it is larger than the sum of its proper divisors (22017607).

109061561 is a wasteful number, since it uses less digits than its factorization.

109061561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5332.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 109061561 is about 10443.2543299491. The cubic root of 109061561 is about 477.7755302440.

The spelling of 109061561 in words is "one hundred nine million, sixty-one thousand, five hundred sixty-one".