827520787649 has 2 divisors, whose sum is σ = 827520787650. Its totient is φ = 827520787648.

The previous prime is 827520787627. The next prime is 827520787657. The reversal of 827520787649 is 946787025728.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 824224305424 + 3296482225 = 907868^2 + 57415^2 .

It is a cyclic number.

It is not a de Polignac number, because 827520787649 - 2¹² = 827520783553 is a prime.

It is not a weakly prime, because it can be changed into another prime (827520787669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413760393824 + 413760393825.

It is an arithmetic number, because the mean of its divisors is an integer number (413760393825).

Almost surely, 2^827520787649 is an apocalyptic number.

It is an amenable number.

827520787649 is a deficient number, since it is larger than the sum of its proper divisors (1).

827520787649 is an equidigital number, since it uses as much as digits as its factorization.

827520787649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94832640, while the sum is 65.

The spelling of 827520787649 in words is "eight hundred twenty-seven billion, five hundred twenty million, seven hundred eighty-seven thousand, six hundred forty-nine".