491928750720 has 1536 divisors, whose sum is σ = 2054898201600. Its totient is φ = 110252482560.

The previous prime is 491928750713. The next prime is 491928750721. The reversal of 491928750720 is 27057829194.

491928750720 is a `hidden beast` number, since 4 + 91 + 9 + 28 + 7 + 507 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491928750721) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 4597464907 + ... + 4597465013.

It is an arithmetic number, because the mean of its divisors is an integer number (1337824350).

Almost surely, 2^491928750720 is an apocalyptic number.

491928750720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491928750720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1027449100800).

491928750720 is an abundant number, since it is smaller than the sum of its proper divisors (1562969450880).

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

491928750720 is a wasteful number, since it uses less digits than its factorization.

491928750720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 54.

The spelling of 491928750720 in words is "four hundred ninety-one billion, nine hundred twenty-eight million, seven hundred fifty thousand, seven hundred twenty".