491275659 has 16 divisors (see below), whose sum is σ = 749439488. Its totient is φ = 280418112.

The previous prime is 491275651. The next prime is 491275661. The reversal of 491275659 is 956572194.

It is not a de Polignac number, because 491275659 - 2³ = 491275651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491275651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7194 + ... + 32160.

It is an arithmetic number, because the mean of its divisors is an integer number (46839968).

Almost surely, 2^491275659 is an apocalyptic number.

491275659 is a deficient number, since it is larger than the sum of its proper divisors (258163829).

491275659 is a wasteful number, since it uses less digits than its factorization.

491275659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25914.

The product of its digits is 680400, while the sum is 48.

The square root of 491275659 is about 22164.7390916293. The cubic root of 491275659 is about 789.0570702517.

The spelling of 491275659 in words is "four hundred ninety-one million, two hundred seventy-five thousand, six hundred fifty-nine".