109856551 has 8 divisors (see below), whose sum is σ = 125617664. Its totient is φ = 94112280.

The previous prime is 109856519. The next prime is 109856569. The reversal of 109856551 is 155658901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 109856551 - 2⁵ = 109856519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109856581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16726 + ... + 22348.

It is an arithmetic number, because the mean of its divisors is an integer number (15702208).

Almost surely, 2^109856551 is an apocalyptic number.

109856551 is a deficient number, since it is larger than the sum of its proper divisors (15761113).

109856551 is an equidigital number, since it uses as much as digits as its factorization.

109856551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8421.

The product of its (nonzero) digits is 54000, while the sum is 40.

The square root of 109856551 is about 10481.2475879544. The cubic root of 109856551 is about 478.9336149852.

The spelling of 109856551 in words is "one hundred nine million, eight hundred fifty-six thousand, five hundred fifty-one".