491660160 has 128 divisors (see below), whose sum is σ = 1577784960. Its totient is φ = 130222080.

The previous prime is 491660129. The next prime is 491660201. The reversal of 491660160 is 61066194.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312175 + ... + 313745.

It is an arithmetic number, because the mean of its divisors is an integer number (12326445).

Almost surely, 2^491660160 is an apocalyptic number.

491660160 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 491660160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (788892480).

491660160 is an abundant number, since it is smaller than the sum of its proper divisors (1086124800).

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

491660160 is a wasteful number, since it uses less digits than its factorization.

491660160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1756 (or 1744 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 491660160 is about 22173.4111042934. The cubic root of 491660160 is about 789.2628706072.

The spelling of 491660160 in words is "four hundred ninety-one million, six hundred sixty thousand, one hundred sixty".