6509705905 has 16 divisors (see below), whose sum is σ = 7848993024. Its totient is φ = 5182911360.

The previous prime is 6509705861. The next prime is 6509705933. The reversal of 6509705905 is 5095079056.

6509705905 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6509705905 - 2⁹ = 6509705393 is a prime.

It is a Duffinian 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, 1614502 + ... + 1618528.

It is an arithmetic number, because the mean of its divisors is an integer number (490562064).

Almost surely, 2^6509705905 is an apocalyptic number.

It is an amenable number.

6509705905 is a deficient number, since it is larger than the sum of its proper divisors (1339287119).

6509705905 is a wasteful number, since it uses less digits than its factorization.

6509705905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5496.

The product of its (nonzero) digits is 425250, while the sum is 46.

The square root of 6509705905 is about 80682.7484968131. The cubic root of 6509705905 is about 1867.1840240974.

The spelling of 6509705905 in words is "six billion, five hundred nine million, seven hundred five thousand, nine hundred five".