2109755655 has 192 divisors, whose sum is σ = 4566481920. Its totient is φ = 880588800.

The previous prime is 2109755653. The next prime is 2109755677. The reversal of 2109755655 is 5565579012.

2109755655 is a `hidden beast` number, since 2 + 1 + 0 + 97 + 556 + 5 + 5 = 666.

It is not a de Polignac number, because 2109755655 - 2¹ = 2109755653 is a prime.

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 2109755655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2109755653) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 16104940 + ... + 16105070.

It is an arithmetic number, because the mean of its divisors is an integer number (23783760).

Almost surely, 2^2109755655 is an apocalyptic number.

2109755655 is an abundant number, since it is smaller than the sum of its proper divisors (2456726265).

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

2109755655 is a wasteful number, since it uses less digits than its factorization.

2109755655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 472500, while the sum is 45.

The square root of 2109755655 is about 45932.0765369910. The cubic root of 2109755655 is about 1282.5591003623.

The spelling of 2109755655 in words is "two billion, one hundred nine million, seven hundred fifty-five thousand, six hundred fifty-five".