82605957709 has 4 divisors (see below), whose sum is σ = 90115590240. Its totient is φ = 75096325180.

The previous prime is 82605957701. The next prime is 82605957713. The reversal of 82605957709 is 90775950628.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82605957709 - 2³ = 82605957701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82605957701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3754816249 + ... + 3754816270.

It is an arithmetic number, because the mean of its divisors is an integer number (22528897560).

Almost surely, 2^82605957709 is an apocalyptic number.

It is an amenable number.

82605957709 is a deficient number, since it is larger than the sum of its proper divisors (7509632531).

82605957709 is a wasteful number, since it uses less digits than its factorization.

82605957709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7509632530.

The product of its (nonzero) digits is 9525600, while the sum is 58.

The spelling of 82605957709 in words is "eighty-two billion, six hundred five million, nine hundred fifty-seven thousand, seven hundred nine".