82481385457 has 2 divisors, whose sum is σ = 82481385458. Its totient is φ = 82481385456.

The previous prime is 82481385449. The next prime is 82481385463. The reversal of 82481385457 is 75458318428.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42384927376 + 40096458081 = 205876^2 + 200241^2 .

It is a cyclic number.

It is not a de Polignac number, because 82481385457 - 2³ = 82481385449 is a prime.

It is a super-2 number, since 2×82481385457² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 82481385398 and 82481385407.

It is not a weakly prime, because it can be changed into another prime (82481385407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41240692728 + 41240692729.

It is an arithmetic number, because the mean of its divisors is an integer number (41240692729).

Almost surely, 2^82481385457 is an apocalyptic number.

It is an amenable number.

82481385457 is a deficient number, since it is larger than the sum of its proper divisors (1).

82481385457 is an equidigital number, since it uses as much as digits as its factorization.

82481385457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8601600, while the sum is 55.

The spelling of 82481385457 in words is "eighty-two billion, four hundred eighty-one million, three hundred eighty-five thousand, four hundred fifty-seven".