109878250644 has 18 divisors (see below), whose sum is σ = 277747800330. Its totient is φ = 36626083536.

The previous prime is 109878250631. The next prime is 109878250649. The reversal of 109878250644 is 446052878901.

It is a happy number.

109878250644 is a `hidden beast` number, since 1 + 0 + 98 + 7 + 8 + 2 + 506 + 44 = 666.

It can be written as a sum of positive squares in only one way, i.e., 64636960644 + 45241290000 = 254238^2 + 212700^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109878250649) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1526086779 + ... + 1526086850.

Almost surely, 2^109878250644 is an apocalyptic number.

It is an amenable number.

109878250644 is an abundant number, since it is smaller than the sum of its proper divisors (167869549686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

109878250644 is a wasteful number, since it uses less digits than its factorization.

109878250644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3052173639 (or 3052173634 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 109878250644 in words is "one hundred nine billion, eight hundred seventy-eight million, two hundred fifty thousand, six hundred forty-four".