491767920245 has 32 divisors (see below), whose sum is σ = 688296768000. Its totient is φ = 337159162368.

The previous prime is 491767920199. The next prime is 491767920251. The reversal of 491767920245 is 542029767194.

It is a happy number.

It is not a de Polignac number, because 491767920245 - 2¹⁰ = 491767919221 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13082117 + ... + 13119653.

It is an arithmetic number, because the mean of its divisors is an integer number (21509274000).

Almost surely, 2^491767920245 is an apocalyptic number.

It is an amenable number.

491767920245 is a deficient number, since it is larger than the sum of its proper divisors (196528847755).

491767920245 is an equidigital number, since it uses as much as digits as its factorization.

491767920245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45202 (or 45188 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 56.

The spelling of 491767920245 in words is "four hundred ninety-one billion, seven hundred sixty-seven million, nine hundred twenty thousand, two hundred forty-five".