494893604647 has 4 divisors (see below), whose sum is σ = 532962343480. Its totient is φ = 456824865816.

The previous prime is 494893604627. The next prime is 494893604657. The reversal of 494893604647 is 746406398494.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 494893604647 - 2¹⁹ = 494893080359 is a prime.

It is a super-2 number, since 2×494893604647² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (494893604627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19034369397 + ... + 19034369422.

It is an arithmetic number, because the mean of its divisors is an integer number (133240585870).

Almost surely, 2^494893604647 is an apocalyptic number.

494893604647 is a deficient number, since it is larger than the sum of its proper divisors (38068738833).

494893604647 is a wasteful number, since it uses less digits than its factorization.

494893604647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38068738832.

The product of its (nonzero) digits is 125411328, while the sum is 64.

The spelling of 494893604647 in words is "four hundred ninety-four billion, eight hundred ninety-three million, six hundred four thousand, six hundred forty-seven".