494539640524801 has 4 divisors (see below), whose sum is σ = 494540568372672. Its totient is φ = 494538712676932.

The previous prime is 494539640524789. The next prime is 494539640524807. The reversal of 494539640524801 is 108425046935494.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 494539640524801 - 2³¹ = 494537493041153 is a prime.

It is a super-3 number, since 3×494539640524801³ (a number of 45 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (494539640524807) 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, 463123981 + ... + 464190586.

It is an arithmetic number, because the mean of its divisors is an integer number (123635142093168).

Almost surely, 2^{494539640524801} is an apocalyptic number.

It is an amenable number.

494539640524801 is a deficient number, since it is larger than the sum of its proper divisors (927847871).

494539640524801 is an equidigital number, since it uses as much as digits as its factorization.

494539640524801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927847870.

The product of its (nonzero) digits is 149299200, while the sum is 64.

The spelling of 494539640524801 in words is "four hundred ninety-four trillion, five hundred thirty-nine billion, six hundred forty million, five hundred twenty-four thousand, eight hundred one".