491771547203 has 2 divisors, whose sum is σ = 491771547204. Its totient is φ = 491771547202.

The previous prime is 491771547181. The next prime is 491771547217. The reversal of 491771547203 is 302745177194.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 491771547203 - 2²⁰ = 491770498627 is a prime.

It is not a weakly prime, because it can be changed into another prime (491771547233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245885773601 + 245885773602.

It is an arithmetic number, because the mean of its divisors is an integer number (245885773602).

Almost surely, 2^491771547203 is an apocalyptic number.

491771547203 is a deficient number, since it is larger than the sum of its proper divisors (1).

491771547203 is an equidigital number, since it uses as much as digits as its factorization.

491771547203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1481760, while the sum is 50.

The spelling of 491771547203 in words is "four hundred ninety-one billion, seven hundred seventy-one million, five hundred forty-seven thousand, two hundred three".