2605615138 has 32 divisors (see below), whose sum is σ = 4493364480. Its totient is φ = 1110067200.

The previous prime is 2605615127. The next prime is 2605615139. The reversal of 2605615138 is 8315165062.

It is a junction number, because it is equal to n+sod(n) for n = 2605615097 and 2605615106.

It is not an unprimeable number, because it can be changed into a prime (2605615139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2168938 + ... + 2170138.

It is an arithmetic number, because the mean of its divisors is an integer number (140417640).

Almost surely, 2^2605615138 is an apocalyptic number.

2605615138 is a deficient number, since it is larger than the sum of its proper divisors (1887749342).

2605615138 is a wasteful number, since it uses less digits than its factorization.

2605615138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 2605615138 is about 51045.2263977740. The cubic root of 2605615138 is about 1376.0580529326.

The spelling of 2605615138 in words is "two billion, six hundred five million, six hundred fifteen thousand, one hundred thirty-eight".