109648581 has 32 divisors (see below), whose sum is σ = 176529408. Its totient is φ = 59209920.

The previous prime is 109648579. The next prime is 109648619. The reversal of 109648581 is 185846901.

It is not a de Polignac number, because 109648581 - 2¹ = 109648579 is a prime.

It is a super-2 number, since 2×109648581² = 24045622630627122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109648531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26035 + ... + 29951.

It is an arithmetic number, because the mean of its divisors is an integer number (5516544).

Almost surely, 2^109648581 is an apocalyptic number.

It is an amenable number.

109648581 is a deficient number, since it is larger than the sum of its proper divisors (66880827).

109648581 is a wasteful number, since it uses less digits than its factorization.

109648581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4001.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 109648581 is about 10471.3218363299. The cubic root of 109648581 is about 478.6312001764.

The spelling of 109648581 in words is "one hundred nine million, six hundred forty-eight thousand, five hundred eighty-one".