2646505805 has 16 divisors (see below), whose sum is σ = 3312067584. Its totient is φ = 2027773440.

The previous prime is 2646505789. The next prime is 2646505811. The reversal of 2646505805 is 5085056462.

It is not a de Polignac number, because 2646505805 - 2⁴ = 2646505789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72977 + ... + 103046.

It is an arithmetic number, because the mean of its divisors is an integer number (207004224).

Almost surely, 2^2646505805 is an apocalyptic number.

It is an amenable number.

2646505805 is a deficient number, since it is larger than the sum of its proper divisors (665561779).

2646505805 is a wasteful number, since it uses less digits than its factorization.

2646505805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176156.

The product of its (nonzero) digits is 288000, while the sum is 41.

The square root of 2646505805 is about 51444.2008879524. The cubic root of 2646505805 is about 1383.2190143429.

The spelling of 2646505805 in words is "two billion, six hundred forty-six million, five hundred five thousand, eight hundred five".