494178956649 has 96 divisors (see below), whose sum is σ = 876462080000. Its totient is φ = 262052848512.

The previous prime is 494178956627. The next prime is 494178956651. The reversal of 494178956649 is 946659871494.

494178956649 is a `hidden beast` number, since 4 + 9 + 4 + 17 + 8 + 9 + 566 + 49 = 666.

It is not a de Polignac number, because 494178956649 - 2²⁹ = 493642085737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (494178956549) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11988927 + ... + 12030075.

Almost surely, 2^494178956649 is an apocalyptic number.

It is an amenable number.

494178956649 is a deficient number, since it is larger than the sum of its proper divisors (382283123351).

494178956649 is a wasteful number, since it uses less digits than its factorization.

494178956649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41387 (or 41384 counting only the distinct ones).

The product of its digits is 470292480, while the sum is 72.

The spelling of 494178956649 in words is "four hundred ninety-four billion, one hundred seventy-eight million, nine hundred fifty-six thousand, six hundred forty-nine".