109663555 has 4 divisors (see below), whose sum is σ = 131596272. Its totient is φ = 87730840.

The previous prime is 109663511. The next prime is 109663559. The reversal of 109663555 is 555366901.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 109663555 - 2¹³ = 109655363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109663559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10966351 + ... + 10966360.

It is an arithmetic number, because the mean of its divisors is an integer number (32899068).

Almost surely, 2^109663555 is an apocalyptic number.

109663555 is a deficient number, since it is larger than the sum of its proper divisors (21932717).

109663555 is an equidigital number, since it uses as much as digits as its factorization.

109663555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21932716.

The product of its (nonzero) digits is 121500, while the sum is 40.

The square root of 109663555 is about 10472.0368123876. The cubic root of 109663555 is about 478.6529870441.

The spelling of 109663555 in words is "one hundred nine million, six hundred sixty-three thousand, five hundred fifty-five".