491603112000 has 2688 divisors, whose sum is σ = 2492317900800. Its totient is φ = 89081856000.

The previous prime is 491603111983. The next prime is 491603112031. The reversal of 491603112000 is 211306194.

491603112000 is a `hidden beast` number, since 4 + 91 + 60 + 311 + 200 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 1369367821 + ... + 1369368179.

It is an arithmetic number, because the mean of its divisors is an integer number (927201600).

Almost surely, 2^491603112000 is an apocalyptic number.

491603112000 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 491603112000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1246158950400).

491603112000 is an abundant number, since it is smaller than the sum of its proper divisors (2000714788800).

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

491603112000 is a wasteful number, since it uses less digits than its factorization.

491603112000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

Adding to 491603112000 its reverse (211306194), we get a palindrome (491814418194).

The spelling of 491603112000 in words is "four hundred ninety-one billion, six hundred three million, one hundred twelve thousand".