2605555138 has 8 divisors (see below), whose sum is σ = 4078260288. Its totient is φ = 1246135044.

The previous prime is 2605555129. The next prime is 2605555151. The reversal of 2605555138 is 8315555062.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2605555138.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 28321206 + ... + 28321297.

It is an arithmetic number, because the mean of its divisors is an integer number (509782536).

Almost surely, 2^2605555138 is an apocalyptic number.

2605555138 is a deficient number, since it is larger than the sum of its proper divisors (1472705150).

2605555138 is a wasteful number, since it uses less digits than its factorization.

2605555138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56642528.

The product of its (nonzero) digits is 180000, while the sum is 40.

The square root of 2605555138 is about 51044.6386802767. The cubic root of 2605555138 is about 1376.0474906005.

The spelling of 2605555138 in words is "two billion, six hundred five million, five hundred fifty-five thousand, one hundred thirty-eight".