109878545 has 16 divisors (see below), whose sum is σ = 154197120. Its totient is φ = 73592064.

The previous prime is 109878511. The next prime is 109878547. The reversal of 109878545 is 545878901.

It is not a de Polignac number, because 109878545 - 2⁶ = 109878481 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 109878545.

It is not an unprimeable number, because it can be changed into a prime (109878547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35000 + ... + 38009.

It is an arithmetic number, because the mean of its divisors is an integer number (9637320).

Almost surely, 2^109878545 is an apocalyptic number.

It is an amenable number.

109878545 is a deficient number, since it is larger than the sum of its proper divisors (44318575).

109878545 is an equidigital number, since it uses as much as digits as its factorization.

109878545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73064.

The product of its (nonzero) digits is 403200, while the sum is 47.

The square root of 109878545 is about 10482.2967426037. The cubic root of 109878545 is about 478.9655747332.

The spelling of 109878545 in words is "one hundred nine million, eight hundred seventy-eight thousand, five hundred forty-five".