82316557261 has 8 divisors (see below), whose sum is σ = 82456612280. Its totient is φ = 82176602112.

The previous prime is 82316557189. The next prime is 82316557283. The reversal of 82316557261 is 16275561328.

It can be written as a sum of positive squares in 4 ways, for example, as 4576522500 + 77740034761 = 67650^2 + 278819^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82316557261 - 2¹⁹ = 82316032973 is a prime.

It is a super-3 number, since 3×82316557261³ (a number of 34 digits) contains 333 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 (82316557061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1728181 + ... + 1775173.

It is an arithmetic number, because the mean of its divisors is an integer number (10307076535).

Almost surely, 2^82316557261 is an apocalyptic number.

It is an amenable number.

82316557261 is a deficient number, since it is larger than the sum of its proper divisors (140055019).

82316557261 is a wasteful number, since it uses less digits than its factorization.

82316557261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49935.

The product of its digits is 604800, while the sum is 46.

The spelling of 82316557261 in words is "eighty-two billion, three hundred sixteen million, five hundred fifty-seven thousand, two hundred sixty-one".