491729646027 has 8 divisors (see below), whose sum is σ = 656098986816. Its totient is φ = 327590034632.

The previous prime is 491729646017. The next prime is 491729646029. The reversal of 491729646027 is 720646927194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491729646027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491729646029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57427353 + ... + 57435914.

It is an arithmetic number, because the mean of its divisors is an integer number (82012373352).

Almost surely, 2^491729646027 is an apocalyptic number.

491729646027 is a deficient number, since it is larger than the sum of its proper divisors (164369340789).

491729646027 is a wasteful number, since it uses less digits than its factorization.

491729646027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114864697.

The product of its (nonzero) digits is 9144576, while the sum is 57.

The spelling of 491729646027 in words is "four hundred ninety-one billion, seven hundred twenty-nine million, six hundred forty-six thousand, twenty-seven".