494835138561 has 16 divisors (see below), whose sum is σ = 685960043328. Its totient is φ = 317040345600.

The previous prime is 494835138529. The next prime is 494835138563. The reversal of 494835138561 is 165831538494.

It is not a de Polignac number, because 494835138561 - 2⁵ = 494835138529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (494835138563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30014520 + ... + 30031001.

It is an arithmetic number, because the mean of its divisors is an integer number (42872502708).

Almost surely, 2^494835138561 is an apocalyptic number.

494835138561 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

494835138561 is a deficient number, since it is larger than the sum of its proper divisors (191124904767).

494835138561 is a wasteful number, since it uses less digits than its factorization.

494835138561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60045632.

The product of its digits is 12441600, while the sum is 57.

The spelling of 494835138561 in words is "four hundred ninety-four billion, eight hundred thirty-five million, one hundred thirty-eight thousand, five hundred sixty-one".