9945284777 has 2 divisors, whose sum is σ = 9945284778. Its totient is φ = 9945284776.

The previous prime is 9945284759. The next prime is 9945284807. The reversal of 9945284777 is 7774825499.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5607613456 + 4337671321 = 74884^2 + 65861^2 .

It is a cyclic number.

It is not a de Polignac number, because 9945284777 - 2¹⁴ = 9945268393 is a prime.

It is not a weakly prime, because it can be changed into another prime (9945284717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4972642388 + 4972642389.

It is an arithmetic number, because the mean of its divisors is an integer number (4972642389).

Almost surely, 2^9945284777 is an apocalyptic number.

It is an amenable number.

9945284777 is a deficient number, since it is larger than the sum of its proper divisors (1).

9945284777 is an equidigital number, since it uses as much as digits as its factorization.

9945284777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35562240, while the sum is 62.

The square root of 9945284777 is about 99726.0486382570. The cubic root of 9945284777 is about 2150.4981558500.

The spelling of 9945284777 in words is "nine billion, nine hundred forty-five million, two hundred eighty-four thousand, seven hundred seventy-seven".