2645655405 has 16 divisors (see below), whose sum is σ = 4242124224. Its totient is φ = 1407991040.

The previous prime is 2645655401. The next prime is 2645655443. The reversal of 2645655405 is 5045565462.

It is a happy number.

It is not a de Polignac number, because 2645655405 - 2² = 2645655401 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645655401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181836 + ... + 195845.

It is an arithmetic number, because the mean of its divisors is an integer number (265132764).

Almost surely, 2^2645655405 is an apocalyptic number.

It is an amenable number.

2645655405 is a deficient number, since it is larger than the sum of its proper divisors (1596468819).

2645655405 is a wasteful number, since it uses less digits than its factorization.

2645655405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378156.

The product of its (nonzero) digits is 720000, while the sum is 42.

The square root of 2645655405 is about 51435.9349579649. The cubic root of 2645655405 is about 1383.0708421804.

The spelling of 2645655405 in words is "two billion, six hundred forty-five million, six hundred fifty-five thousand, four hundred five".