491598771 has 16 divisors (see below), whose sum is σ = 661090560. Its totient is φ = 324928800.

The previous prime is 491598727. The next prime is 491598781. The reversal of 491598771 is 177895194.

It is a happy number.

It is not a de Polignac number, because 491598771 - 2¹⁰ = 491597747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491598721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 399385 + ... + 400613.

It is an arithmetic number, because the mean of its divisors is an integer number (41318160).

Almost surely, 2^491598771 is an apocalyptic number.

491598771 is a deficient number, since it is larger than the sum of its proper divisors (169491789).

491598771 is a wasteful number, since it uses less digits than its factorization.

491598771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2266.

The product of its digits is 635040, while the sum is 51.

The square root of 491598771 is about 22172.0267679795. The cubic root of 491598771 is about 789.2300199521.

The spelling of 491598771 in words is "four hundred ninety-one million, five hundred ninety-eight thousand, seven hundred seventy-one".