6509872211785 has 16 divisors (see below), whose sum is σ = 7837810122240. Its totient is φ = 5190615613440.

The previous prime is 6509872211767. The next prime is 6509872211797. The reversal of 6509872211785 is 5871122789056.

It is a de Polignac number, because none of the positive numbers 2^k-6509872211785 is a prime.

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, 266569 + ... + 3618121.

It is an arithmetic number, because the mean of its divisors is an integer number (489863132640).

Almost surely, 2^{6509872211785} is an apocalyptic number.

It is an amenable number.

6509872211785 is a deficient number, since it is larger than the sum of its proper divisors (1327937910455).

6509872211785 is a wasteful number, since it uses less digits than its factorization.

6509872211785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3352848.

The product of its (nonzero) digits is 16934400, while the sum is 61.

The spelling of 6509872211785 in words is "six trillion, five hundred nine billion, eight hundred seventy-two million, two hundred eleven thousand, seven hundred eighty-five".