494683689991 has 2 divisors, whose sum is σ = 494683689992. Its totient is φ = 494683689990.

The previous prime is 494683689959. The next prime is 494683690001. The reversal of 494683689991 is 199986386494.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 494683689991 - 2⁵ = 494683689959 is a prime.

It is a super-2 number, since 2×494683689991² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (494683684991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247341844995 + 247341844996.

It is an arithmetic number, because the mean of its divisors is an integer number (247341844996).

Almost surely, 2^494683689991 is an apocalyptic number.

494683689991 is a deficient number, since it is larger than the sum of its proper divisors (1).

494683689991 is an equidigital number, since it uses as much as digits as its factorization.

494683689991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725594112, while the sum is 76.

The spelling of 494683689991 in words is "four hundred ninety-four billion, six hundred eighty-three million, six hundred eighty-nine thousand, nine hundred ninety-one".