2605745656 has 8 divisors (see below), whose sum is σ = 4885773120. Its totient is φ = 1302872824.

The previous prime is 2605745651. The next prime is 2605745657. The reversal of 2605745656 is 6565475062.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2605745651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162859096 + ... + 162859111.

It is an arithmetic number, because the mean of its divisors is an integer number (610721640).

Almost surely, 2^2605745656 is an apocalyptic number.

It is an amenable number.

2605745656 is a deficient number, since it is larger than the sum of its proper divisors (2280027464).

2605745656 is a wasteful number, since it uses less digits than its factorization.

2605745656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325718213 (or 325718209 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 46.

The square root of 2605745656 is about 51046.5048362765. The cubic root of 2605745656 is about 1376.0810286135.

The spelling of 2605745656 in words is "two billion, six hundred five million, seven hundred forty-five thousand, six hundred fifty-six".