491421494592 has 1120 divisors, whose sum is σ = 1789397406720. Its totient is φ = 130427781120.

The previous prime is 491421494567. The next prime is 491421494609. The reversal of 491421494592 is 295494124194.

491421494592 is a `hidden beast` number, since 4 + 9 + 1 + 4 + 2 + 1 + 49 + 4 + 592 = 666.

It is a super-3 number, since 3×491421494592³ (a number of 36 digits) contains 333 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 4348862728 + ... + 4348862840.

It is an arithmetic number, because the mean of its divisors is an integer number (1597676256).

Almost surely, 2^491421494592 is an apocalyptic number.

491421494592 is a gapful number since it is divisible by the number (42) 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 491421494592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (894698703360).

491421494592 is an abundant number, since it is smaller than the sum of its proper divisors (1297975912128).

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

491421494592 is a wasteful number, since it uses less digits than its factorization.

491421494592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301 (or 282 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The spelling of 491421494592 in words is "four hundred ninety-one billion, four hundred twenty-one million, four hundred ninety-four thousand, five hundred ninety-two".