82520553569 has 4 divisors (see below), whose sum is σ = 83321724096. Its totient is φ = 81719383044.

The previous prime is 82520553503. The next prime is 82520553601. The reversal of 82520553569 is 96535502528.

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 a de Polignac number, because none of the positive numbers 2^k-82520553569 is a prime.

It is a super-2 number, since 2×82520553569² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82520550569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400585109 + ... + 400585314.

It is an arithmetic number, because the mean of its divisors is an integer number (20830431024).

Almost surely, 2^82520553569 is an apocalyptic number.

It is an amenable number.

82520553569 is a deficient number, since it is larger than the sum of its proper divisors (801170527).

82520553569 is a wasteful number, since it uses less digits than its factorization.

82520553569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801170526.

The product of its (nonzero) digits is 3240000, while the sum is 50.

The spelling of 82520553569 in words is "eighty-two billion, five hundred twenty million, five hundred fifty-three thousand, five hundred sixty-nine".