82520287435681 has 2 divisors, whose sum is σ = 82520287435682. Its totient is φ = 82520287435680.

The previous prime is 82520287435639. The next prime is 82520287435759. The reversal of 82520287435681 is 18653478202528.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48889462410000 + 33630825025681 = 6992100^2 + 5799209^2 .

It is a cyclic number.

It is not a de Polignac number, because 82520287435681 - 2²¹ = 82520285338529 is a prime.

It is a super-2 number, since 2×82520287435681² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82520287438681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41260143717840 + 41260143717841.

It is an arithmetic number, because the mean of its divisors is an integer number (41260143717841).

Almost surely, 2^{82520287435681} is an apocalyptic number.

It is an amenable number.

82520287435681 is a deficient number, since it is larger than the sum of its proper divisors (1).

82520287435681 is an equidigital number, since it uses as much as digits as its factorization.

82520287435681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51609600, while the sum is 61.

The spelling of 82520287435681 in words is "eighty-two trillion, five hundred twenty billion, two hundred eighty-seven million, four hundred thirty-five thousand, six hundred eighty-one".