999780450241 has 2 divisors, whose sum is σ = 999780450242. Its totient is φ = 999780450240.

The previous prime is 999780450233. The next prime is 999780450301. The reversal of 999780450241 is 142054087999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 975156250000 + 24624200241 = 987500^2 + 156921^2 .

It is a cyclic number.

It is not a de Polignac number, because 999780450241 - 2³ = 999780450233 is a prime.

It is not a weakly prime, because it can be changed into another prime (999780450341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499890225120 + 499890225121.

It is an arithmetic number, because the mean of its divisors is an integer number (499890225121).

Almost surely, 2^999780450241 is an apocalyptic number.

It is an amenable number.

999780450241 is a deficient number, since it is larger than the sum of its proper divisors (1).

999780450241 is an equidigital number, since it uses as much as digits as its factorization.

999780450241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 999780450241 in words is "nine hundred ninety-nine billion, seven hundred eighty million, four hundred fifty thousand, two hundred forty-one".