82555735210521 has 16 divisors (see below), whose sum is σ = 111711254302080. Its totient is φ = 54219889216640.

The previous prime is 82555735210517. The next prime is 82555735210537. The reversal of 82555735210521 is 12501253755528.

It is a cyclic number.

It is not a de Polignac number, because 82555735210521 - 2² = 82555735210517 is a prime.

It is a super-2 number, since 2×82555735210521² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82555735210511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150068970 + ... + 150618083.

It is an arithmetic number, because the mean of its divisors is an integer number (6981953393880).

Almost surely, 2^{82555735210521} is an apocalyptic number.

It is an amenable number.

82555735210521 is a deficient number, since it is larger than the sum of its proper divisors (29155519091559).

82555735210521 is a wasteful number, since it uses less digits than its factorization.

82555735210521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300688416.

The product of its (nonzero) digits is 4200000, while the sum is 51.

The spelling of 82555735210521 in words is "eighty-two trillion, five hundred fifty-five billion, seven hundred thirty-five million, two hundred ten thousand, five hundred twenty-one".