494169486128640 has 3840 divisors, whose sum is σ = 2300116463124480. Its totient is φ = 99041983856640.

The previous prime is 494169486128587. The next prime is 494169486128701. The reversal of 494169486128640 is 46821684961494.

494169486128640 is a `hidden beast` number, since 4 + 9 + 4 + 1 + 69 + 486 + 1 + 2 + 86 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (3840).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 58991220132 + ... + 58991228508.

It is an arithmetic number, because the mean of its divisors is an integer number (598988662272).

Almost surely, 2^{494169486128640} is an apocalyptic number.

494169486128640 is a gapful number since it is divisible by the number (40) 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 494169486128640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1150058231562240).

494169486128640 is an abundant number, since it is smaller than the sum of its proper divisors (1805946976995840).

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

494169486128640 is a wasteful number, since it uses less digits than its factorization.

494169486128640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8495 (or 8467 counting only the distinct ones).

The product of its (nonzero) digits is 573308928, while the sum is 72.

The spelling of 494169486128640 in words is "four hundred ninety-four trillion, one hundred sixty-nine billion, four hundred eighty-six million, one hundred twenty-eight thousand, six hundred forty".