490574128861 has 2 divisors, whose sum is σ = 490574128862. Its totient is φ = 490574128860.

The previous prime is 490574128831. The next prime is 490574128897. The reversal of 490574128861 is 168821475094.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 488440243225 + 2133885636 = 698885^2 + 46194^2 .

It is a cyclic number.

It is not a de Polignac number, because 490574128861 - 2¹³ = 490574120669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (490574128831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245287064430 + 245287064431.

It is an arithmetic number, because the mean of its divisors is an integer number (245287064431).

Almost surely, 2^490574128861 is an apocalyptic number.

It is an amenable number.

490574128861 is a deficient number, since it is larger than the sum of its proper divisors (1).

490574128861 is an equidigital number, since it uses as much as digits as its factorization.

490574128861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 490574128861 in words is "four hundred ninety billion, five hundred seventy-four million, one hundred twenty-eight thousand, eight hundred sixty-one".