494618995990656 has 128 divisors (see below), whose sum is σ = 1459967762880000. Its totient is φ = 164855520580608.

The previous prime is 494618995990643. The next prime is 494618995990681. The reversal of 494618995990656 is 656099599816494.

494618995990656 is a `hidden beast` number, since 4 + 9 + 4 + 6 + 1 + 8 + 9 + 9 + 599 + 0 + 6 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25039930 + ... + 40202438.

It is an arithmetic number, because the mean of its divisors is an integer number (11405998147500).

Almost surely, 2^{494618995990656} 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 494618995990656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (729983881440000).

494618995990656 is an abundant number, since it is smaller than the sum of its proper divisors (965348766889344).

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

494618995990656 is a wasteful number, since it uses less digits than its factorization.

494618995990656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15171971 (or 15171953 counting only the distinct ones).

The product of its (nonzero) digits is 40814668800, while the sum is 90.

The spelling of 494618995990656 in words is "four hundred ninety-four trillion, six hundred eighteen billion, nine hundred ninety-five million, nine hundred ninety thousand, six hundred fifty-six".