491316077656 has 16 divisors (see below), whose sum is σ = 921227680800. Its totient is φ = 245655362784.

The previous prime is 491316077627. The next prime is 491316077657. The reversal of 491316077656 is 656770613194.

It is a junction number, because it is equal to n+sod(n) for n = 491316077597 and 491316077606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491316077657) 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 3 ways as a sum of consecutive naturals, for example, 599041 + ... + 1158223.

It is an arithmetic number, because the mean of its divisors is an integer number (57576730050).

Almost surely, 2^491316077656 is an apocalyptic number.

It is an amenable number.

491316077656 is a deficient number, since it is larger than the sum of its proper divisors (429911603144).

491316077656 is a wasteful number, since it uses less digits than its factorization.

491316077656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669018 (or 669014 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 55.

The spelling of 491316077656 in words is "four hundred ninety-one billion, three hundred sixteen million, seventy-seven thousand, six hundred fifty-six".