828520766449 has 2 divisors, whose sum is σ = 828520766450. Its totient is φ = 828520766448.

The previous prime is 828520766401. The next prime is 828520766503. The reversal of 828520766449 is 944667025828.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 820718224225 + 7802542224 = 905935^2 + 88332^2 .

It is a cyclic number.

It is not a de Polignac number, because 828520766449 - 2¹³ = 828520758257 is a prime.

It is not a weakly prime, because it can be changed into another prime (828520716449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414260383224 + 414260383225.

It is an arithmetic number, because the mean of its divisors is an integer number (414260383225).

Almost surely, 2^828520766449 is an apocalyptic number.

It is an amenable number.

828520766449 is a deficient number, since it is larger than the sum of its proper divisors (1).

828520766449 is an equidigital number, since it uses as much as digits as its factorization.

828520766449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46448640, while the sum is 61.

The spelling of 828520766449 in words is "eight hundred twenty-eight billion, five hundred twenty million, seven hundred sixty-six thousand, four hundred forty-nine".