491765479005 has 16 divisors (see below), whose sum is σ = 786859709184. Its totient is φ = 262263274560.

The previous prime is 491765479001. The next prime is 491765479013. The reversal of 491765479005 is 500974567194.

It is a happy number.

It is not a de Polignac number, because 491765479005 - 2² = 491765479001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491765479001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 373381 + ... + 1059690.

It is an arithmetic number, because the mean of its divisors is an integer number (49178731824).

Almost surely, 2^491765479005 is an apocalyptic number.

It is an amenable number.

491765479005 is a deficient number, since it is larger than the sum of its proper divisors (295094230179).

491765479005 is a wasteful number, since it uses less digits than its factorization.

491765479005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455956.

The product of its (nonzero) digits is 9525600, while the sum is 57.

The spelling of 491765479005 in words is "four hundred ninety-one billion, seven hundred sixty-five million, four hundred seventy-nine thousand, five".