82510318205813 has 4 divisors (see below), whose sum is σ = 82510846972620. Its totient is φ = 82509789439008.

The previous prime is 82510318205741. The next prime is 82510318205999. The reversal of 82510318205813 is 31850281301528.

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 75218465888164 + 7291852317649 = 8672858^2 + 2700343^2 .

It is a cyclic number.

It is not a de Polignac number, because 82510318205813 - 2³² = 82506023238517 is a prime.

It is a super-2 number, since 2×82510318205813² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82510312205813) 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, 264149270 + ... + 264461447.

It is an arithmetic number, because the mean of its divisors is an integer number (20627711743155).

Almost surely, 2^{82510318205813} is an apocalyptic number.

It is an amenable number.

82510318205813 is a deficient number, since it is larger than the sum of its proper divisors (528766807).

82510318205813 is a wasteful number, since it uses less digits than its factorization.

82510318205813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528766806.

The product of its (nonzero) digits is 460800, while the sum is 47.

The spelling of 82510318205813 in words is "eighty-two trillion, five hundred ten billion, three hundred eighteen million, two hundred five thousand, eight hundred thirteen".