82805052525005 has 4 divisors (see below), whose sum is σ = 99366063030012. Its totient is φ = 66244042020000.

The previous prime is 82805052525001. The next prime is 82805052525031. The reversal of 82805052525005 is 50052525050828.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45573260135209 + 37231792389796 = 6750797^2 + 6101786^2 .

It is not a de Polignac number, because 82805052525005 - 2² = 82805052525001 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 (82805052525001) 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, 8280505252496 + ... + 8280505252505.

It is an arithmetic number, because the mean of its divisors is an integer number (24841515757503).

Almost surely, 2^{82805052525005} is an apocalyptic number.

It is an amenable number.

82805052525005 is a deficient number, since it is larger than the sum of its proper divisors (16561010505007).

82805052525005 is a wasteful number, since it uses less digits than its factorization.

82805052525005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16561010505006.

The product of its (nonzero) digits is 1600000, while the sum is 47.

The spelling of 82805052525005 in words is "eighty-two trillion, eight hundred five billion, fifty-two million, five hundred twenty-five thousand, five".