491174428799 has 4 divisors (see below), whose sum is σ = 491201271120. Its totient is φ = 491147586480.

The previous prime is 491174428777. The next prime is 491174428841. The reversal of 491174428799 is 997824471194.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 491174428799 - 2¹² = 491174424703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491174428099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13393694 + ... + 13430315.

It is an arithmetic number, because the mean of its divisors is an integer number (122800317780).

Almost surely, 2^491174428799 is an apocalyptic number.

491174428799 is a deficient number, since it is larger than the sum of its proper divisors (26842321).

491174428799 is a wasteful number, since it uses less digits than its factorization.

491174428799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26842320.

The product of its digits is 36578304, while the sum is 65.

The spelling of 491174428799 in words is "four hundred ninety-one billion, one hundred seventy-four million, four hundred twenty-eight thousand, seven hundred ninety-nine".