2109608955 has 20 divisors (see below), whose sum is σ = 3781670112. Its totient is φ = 1125124560.

The previous prime is 2109608951. The next prime is 2109608981. The reversal of 2109608955 is 5598069012.

It is not a de Polignac number, because 2109608955 - 2² = 2109608951 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 2109608955.

It is not an unprimeable number, because it can be changed into a prime (2109608951) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2604051 + ... + 2604860.

Almost surely, 2^2109608955 is an apocalyptic number.

2109608955 is a deficient number, since it is larger than the sum of its proper divisors (1672061157).

2109608955 is an equidigital number, since it uses as much as digits as its factorization.

2109608955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5208928 (or 5208919 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The square root of 2109608955 is about 45930.4795860004. The cubic root of 2109608955 is about 1282.5293724677.

The spelling of 2109608955 in words is "two billion, one hundred nine million, six hundred eight thousand, nine hundred fifty-five".