491237325420 has 96 divisors (see below), whose sum is σ = 1457905272768. Its totient is φ = 123161321472.

The previous prime is 491237325373. The next prime is 491237325431. The reversal of 491237325420 is 24523732194.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 719382 + ... + 1224738.

It is an arithmetic number, because the mean of its divisors is an integer number (15186513258).

Almost surely, 2^491237325420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491237325420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (728952636384).

491237325420 is an abundant number, since it is smaller than the sum of its proper divisors (966667947348).

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

491237325420 is a wasteful number, since it uses less digits than its factorization.

491237325420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506339 (or 506337 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 491237325420 in words is "four hundred ninety-one billion, two hundred thirty-seven million, three hundred twenty-five thousand, four hundred twenty".