491174428801 has 16 divisors (see below), whose sum is σ = 581760570240. Its totient is φ = 405745966080.

The previous prime is 491174428777. The next prime is 491174428841. The reversal of 491174428801 is 108824471194.

It is a happy number.

It is not a de Polignac number, because 491174428801 - 2¹⁷ = 491174297729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491174428841) 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, 2100640 + ... + 2322721.

It is an arithmetic number, because the mean of its divisors is an integer number (36360035640).

Almost surely, 2^491174428801 is an apocalyptic number.

It is an amenable number.

491174428801 is a deficient number, since it is larger than the sum of its proper divisors (90586141439).

491174428801 is a wasteful number, since it uses less digits than its factorization.

491174428801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4423944.

The product of its (nonzero) digits is 516096, while the sum is 49.

Adding to 491174428801 its reverse (108824471194), we get a palindrome (599998899995).

The spelling of 491174428801 in words is "four hundred ninety-one billion, one hundred seventy-four million, four hundred twenty-eight thousand, eight hundred one".