491964650 has 24 divisors (see below), whose sum is σ = 915652704. Its totient is φ = 196657200.

The previous prime is 491964643. The next prime is 491964659. The reversal of 491964650 is 56469194.

It is not an unprimeable number, because it can be changed into a prime (491964659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123185 + ... + 127115.

It is an arithmetic number, because the mean of its divisors is an integer number (38152196).

Almost surely, 2^491964650 is an apocalyptic number.

491964650 is a deficient number, since it is larger than the sum of its proper divisors (423688054).

491964650 is a wasteful number, since it uses less digits than its factorization.

491964650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6446 (or 6441 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 491964650 is about 22180.2761479653. The cubic root of 491964650 is about 789.4257697509.

The spelling of 491964650 in words is "four hundred ninety-one million, nine hundred sixty-four thousand, six hundred fifty".