82744755481 has 2 divisors, whose sum is σ = 82744755482. Its totient is φ = 82744755480.

The previous prime is 82744755439. The next prime is 82744755539. The reversal of 82744755481 is 18455744728.

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., 81113888025 + 1630867456 = 284805^2 + 40384^2 .

It is a cyclic number.

It is not a de Polignac number, because 82744755481 - 2¹¹ = 82744753433 is a prime.

It is a super-2 number, since 2×82744755481² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82744755581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41372377740 + 41372377741.

It is an arithmetic number, because the mean of its divisors is an integer number (41372377741).

Almost surely, 2^82744755481 is an apocalyptic number.

It is an amenable number.

82744755481 is a deficient number, since it is larger than the sum of its proper divisors (1).

82744755481 is an equidigital number, since it uses as much as digits as its factorization.

82744755481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10035200, while the sum is 55.

The spelling of 82744755481 in words is "eighty-two billion, seven hundred forty-four million, seven hundred fifty-five thousand, four hundred eighty-one".