491493251230 has 32 divisors (see below), whose sum is σ = 905538842208. Its totient is φ = 191966544000.

The previous prime is 491493251219. The next prime is 491493251297. The reversal of 491493251230 is 32152394194.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1246300 + ... + 1592560.

It is an arithmetic number, because the mean of its divisors is an integer number (28298088819).

Almost surely, 2^491493251230 is an apocalyptic number.

491493251230 is a deficient number, since it is larger than the sum of its proper divisors (414045590978).

491493251230 is a wasteful number, since it uses less digits than its factorization.

491493251230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349612.

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 491493251230 in words is "four hundred ninety-one billion, four hundred ninety-three million, two hundred fifty-one thousand, two hundred thirty".