491651683200 has 192 divisors, whose sum is σ = 1799308906800. Its totient is φ = 131107092480.

The previous prime is 491651683189. The next prime is 491651683223. The reversal of 491651683200 is 2386156194.

491651683200 is a `hidden beast` number, since 4 + 9 + 165 + 168 + 320 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2758807 + ... + 2931606.

Almost surely, 2^491651683200 is an apocalyptic number.

491651683200 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

491651683200 is an abundant number, since it is smaller than the sum of its proper divisors (1307657223600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491651683200 is a wasteful number, since it uses less digits than its factorization.

491651683200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5690446 (or 5690423 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 491651683200 in words is "four hundred ninety-one billion, six hundred fifty-one million, six hundred eighty-three thousand, two hundred".