491841777 has 16 divisors (see below), whose sum is σ = 769730432. Its totient is φ = 273456000.

The previous prime is 491841761. The next prime is 491841787. The reversal of 491841777 is 777148194.

It is a happy number.

It is not a de Polignac number, because 491841777 - 2⁴ = 491841761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491841787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315724 + ... + 317277.

It is an arithmetic number, because the mean of its divisors is an integer number (48108152).

Almost surely, 2^491841777 is an apocalyptic number.

It is an amenable number.

491841777 is a deficient number, since it is larger than the sum of its proper divisors (277888655).

491841777 is a wasteful number, since it uses less digits than its factorization.

491841777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633048.

The product of its digits is 395136, while the sum is 48.

The square root of 491841777 is about 22177.5061041588. The cubic root of 491841777 is about 789.3600420005.

The spelling of 491841777 in words is "four hundred ninety-one million, eight hundred forty-one thousand, seven hundred seventy-seven".