82681335266533 has 2 divisors, whose sum is σ = 82681335266534. Its totient is φ = 82681335266532.

The previous prime is 82681335266483. The next prime is 82681335266567. The reversal of 82681335266533 is 33566253318628.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58624105463044 + 24057229803489 = 7656638^2 + 4904817^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82681335266533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82681335260533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41340667633266 + 41340667633267.

It is an arithmetic number, because the mean of its divisors is an integer number (41340667633267).

Almost surely, 2^{82681335266533} is an apocalyptic number.

It is an amenable number.

82681335266533 is a deficient number, since it is larger than the sum of its proper divisors (1).

82681335266533 is an equidigital number, since it uses as much as digits as its factorization.

82681335266533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 111974400, while the sum is 61.

The spelling of 82681335266533 in words is "eighty-two trillion, six hundred eighty-one billion, three hundred thirty-five million, two hundred sixty-six thousand, five hundred thirty-three".