109591712055 has 96 divisors (see below), whose sum is σ = 232396070400. Its totient is φ = 46657679616.

The previous prime is 109591712029. The next prime is 109591712057. The reversal of 109591712055 is 550217195901.

It is a happy number.

109591712055 is a `hidden beast` number, since 1 + 0 + 9 + 591 + 7 + 1 + 2 + 0 + 55 = 666.

It is not a de Polignac number, because 109591712055 - 2⁷ = 109591711927 is a prime.

It is a super-2 number, since 2×109591712055² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 109591712055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109591712057) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 197937 + ... + 508293.

It is an arithmetic number, because the mean of its divisors is an integer number (2420792400).

Almost surely, 2^109591712055 is an apocalyptic number.

109591712055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

109591712055 is an abundant number, since it is smaller than the sum of its proper divisors (122804358345).

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

109591712055 is a wasteful number, since it uses less digits than its factorization.

109591712055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310453 (or 310450 counting only the distinct ones).

The product of its (nonzero) digits is 141750, while the sum is 45.

The spelling of 109591712055 in words is "one hundred nine billion, five hundred ninety-one million, seven hundred twelve thousand, fifty-five".