491729646028 has 6 divisors (see below), whose sum is σ = 860526880556. Its totient is φ = 245864823012.

The previous prime is 491729646017. The next prime is 491729646029. The reversal of 491729646028 is 820646927194.

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 as a sum of consecutive naturals, namely, 61466205750 + ... + 61466205757.

Almost surely, 2^491729646028 is an apocalyptic number.

It is an amenable number.

491729646028 is a deficient number, since it is larger than the sum of its proper divisors (368797234528).

491729646028 is a wasteful number, since it uses less digits than its factorization.

491729646028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122932411511 (or 122932411509 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 58.

The spelling of 491729646028 in words is "four hundred ninety-one billion, seven hundred twenty-nine million, six hundred forty-six thousand, twenty-eight".