491579883600 has 960 divisors, whose sum is σ = 1824997859328. Its totient is φ = 112223232000.

The previous prime is 491579883593. The next prime is 491579883611. The reversal of 491579883600 is 6388975194.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1485135435 + ... + 1485135765.

Almost surely, 2^491579883600 is an apocalyptic number.

491579883600 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 491579883600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (912498929664).

491579883600 is an abundant number, since it is smaller than the sum of its proper divisors (1333417975728).

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

491579883600 is a wasteful number, since it uses less digits than its factorization.

491579883600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516 (or 505 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 60.

The spelling of 491579883600 in words is "four hundred ninety-one billion, five hundred seventy-nine million, eight hundred eighty-three thousand, six hundred".