8209397785005 has 32 divisors (see below), whose sum is σ = 14594830099200. Its totient is φ = 4378241941056.

The previous prime is 8209397784943. The next prime is 8209397785009. The reversal of 8209397785005 is 5005877939028.

8209397785005 is a `hidden beast` number, since 8 + 20 + 9 + 39 + 7 + 78 + 500 + 5 = 666.

It is not a de Polignac number, because 8209397785005 - 2²¹ = 8209395687853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8209397785009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5189691 + ... + 6584199.

It is an arithmetic number, because the mean of its divisors is an integer number (456088440600).

Almost surely, 2^{8209397785005} is an apocalyptic number.

It is an amenable number.

8209397785005 is a deficient number, since it is larger than the sum of its proper divisors (6385432314195).

8209397785005 is a wasteful number, since it uses less digits than its factorization.

8209397785005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1438130 (or 1438124 counting only the distinct ones).

The product of its (nonzero) digits is 38102400, while the sum is 63.

The spelling of 8209397785005 in words is "eight trillion, two hundred nine billion, three hundred ninety-seven million, seven hundred eighty-five thousand, five".