109238729856 has 64 divisors (see below), whose sum is σ = 290367382080. Its totient is φ = 36387560448.

The previous prime is 109238729849. The next prime is 109238729869. The reversal of 109238729856 is 658927832901.

It is a tau number, because it is divible by the number of its divisors (64).

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

It is a self number, because there is not a number n which added to its sum of digits gives 109238729856.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 457350 + ... + 653946.

It is an arithmetic number, because the mean of its divisors is an integer number (4536990345).

Almost surely, 2^109238729856 is an apocalyptic number.

109238729856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

109238729856 is an abundant number, since it is smaller than the sum of its proper divisors (181128652224).

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

109238729856 is a wasteful number, since it uses less digits than its factorization.

109238729856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198061 (or 198049 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 60.

The spelling of 109238729856 in words is "one hundred nine billion, two hundred thirty-eight million, seven hundred twenty-nine thousand, eight hundred fifty-six".