491251420285 has 8 divisors (see below), whose sum is σ = 589520087136. Its totient is φ = 392988881040.

The previous prime is 491251420249. The next prime is 491251420333. The reversal of 491251420285 is 582024152194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 491251420285 - 2⁹ = 491251419773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1353639 + ... + 1677748.

It is an arithmetic number, because the mean of its divisors is an integer number (73690010892).

Almost surely, 2^491251420285 is an apocalyptic number.

It is an amenable number.

491251420285 is a deficient number, since it is larger than the sum of its proper divisors (98268666851).

491251420285 is a wasteful number, since it uses less digits than its factorization.

491251420285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3063803.

The product of its (nonzero) digits is 230400, while the sum is 43.

The spelling of 491251420285 in words is "four hundred ninety-one billion, two hundred fifty-one million, four hundred twenty thousand, two hundred eighty-five".