82028464649 has 2 divisors, whose sum is σ = 82028464650. Its totient is φ = 82028464648.

The previous prime is 82028464643. The next prime is 82028464667. The reversal of 82028464649 is 94646482028.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68516727049 + 13511737600 = 261757^2 + 116240^2 .

It is a cyclic number.

It is not a de Polignac number, because 82028464649 - 2⁴ = 82028464633 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 82028464649.

It is not a weakly prime, because it can be changed into another prime (82028464643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41014232324 + 41014232325.

It is an arithmetic number, because the mean of its divisors is an integer number (41014232325).

Almost surely, 2^82028464649 is an apocalyptic number.

It is an amenable number.

82028464649 is a deficient number, since it is larger than the sum of its proper divisors (1).

82028464649 is an equidigital number, since it uses as much as digits as its factorization.

82028464649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5308416, while the sum is 53.

The spelling of 82028464649 in words is "eighty-two billion, twenty-eight million, four hundred sixty-four thousand, six hundred forty-nine".