82481218357 has 2 divisors, whose sum is σ = 82481218358. Its totient is φ = 82481218356.

The previous prime is 82481218349. The next prime is 82481218423. The reversal of 82481218357 is 75381218428.

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., 66128179716 + 16353038641 = 257154^2 + 127879^2 .

It is a cyclic number.

It is not a de Polignac number, because 82481218357 - 2³ = 82481218349 is a prime.

It is a super-2 number, since 2×82481218357² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 82481218357.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82481218327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41240609178 + 41240609179.

It is an arithmetic number, because the mean of its divisors is an integer number (41240609179).

Almost surely, 2^82481218357 is an apocalyptic number.

It is an amenable number.

82481218357 is a deficient number, since it is larger than the sum of its proper divisors (1).

82481218357 is an equidigital number, since it uses as much as digits as its factorization.

82481218357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 860160, while the sum is 49.

The spelling of 82481218357 in words is "eighty-two billion, four hundred eighty-one million, two hundred eighteen thousand, three hundred fifty-seven".