490855917847860 has 576 divisors, whose sum is σ = 1618147154018304. Its totient is φ = 124748215603200.

The previous prime is 490855917847817. The next prime is 490855917847991. The reversal of 490855917847860 is 68748719558094.

490855917847860 is a `hidden beast` number, since 4 + 9 + 0 + 8 + 55 + 91 + 7 + 8 + 478 + 6 + 0 = 666.

It is a super-3 number, since 3×490855917847860³ (a number of 45 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a self number, because there is not a number n which added to its sum of digits gives 490855917847860.

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, 9702026724 + ... + 9702077316.

It is an arithmetic number, because the mean of its divisors is an integer number (2809283253504).

Almost surely, 2^{490855917847860} 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 490855917847860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (809073577009152).

490855917847860 is an abundant number, since it is smaller than the sum of its proper divisors (1127291236170444).

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

490855917847860 is a wasteful number, since it uses less digits than its factorization.

490855917847860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51626 (or 51612 counting only the distinct ones).

The product of its (nonzero) digits is 4877107200, while the sum is 81.

The spelling of 490855917847860 in words is "four hundred ninety trillion, eight hundred fifty-five billion, nine hundred seventeen million, eight hundred forty-seven thousand, eight hundred sixty".