491230000330177 has 2 divisors, whose sum is σ = 491230000330178. Its totient is φ = 491230000330176.

The previous prime is 491230000330081. The next prime is 491230000330217. The reversal of 491230000330177 is 771033000032194.

It is an a-pointer prime, because the next prime (491230000330217) can be obtained adding 491230000330177 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 349394191183921 + 141835809146256 = 18692089^2 + 11909484^2 .

It is a cyclic number.

It is not a de Polignac number, because 491230000330177 - 2²³ = 491229991941569 is a prime.

It is not a weakly prime, because it can be changed into another prime (491230000030177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245615000165088 + 245615000165089.

It is an arithmetic number, because the mean of its divisors is an integer number (245615000165089).

Almost surely, 2^{491230000330177} is an apocalyptic number.

It is an amenable number.

491230000330177 is a deficient number, since it is larger than the sum of its proper divisors (1).

491230000330177 is an equidigital number, since it uses as much as digits as its factorization.

491230000330177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 40.

The spelling of 491230000330177 in words is "four hundred ninety-one trillion, two hundred thirty billion, three hundred thirty thousand, one hundred seventy-seven".