491251420284 has 12 divisors (see below), whose sum is σ = 1146253314024. Its totient is φ = 163750473424.

The previous prime is 491251420249. The next prime is 491251420333. The reversal of 491251420284 is 482024152194.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20468809167 + ... + 20468809190.

It is an arithmetic number, because the mean of its divisors is an integer number (95521109502).

Almost surely, 2^491251420284 is an apocalyptic number.

It is an amenable number.

491251420284 is an abundant number, since it is smaller than the sum of its proper divisors (655001893740).

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

491251420284 is a wasteful number, since it uses less digits than its factorization.

491251420284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40937618364 (or 40937618362 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

The spelling of 491251420284 in words is "four hundred ninety-one billion, two hundred fifty-one million, four hundred twenty thousand, two hundred eighty-four".