491733673787 has 12 divisors (see below), whose sum is σ = 526239057240. Its totient is φ = 458215954560.

The previous prime is 491733673771. The next prime is 491733673801. The reversal of 491733673787 is 787376337194.

It is not a de Polignac number, because 491733673787 - 2⁴ = 491733673771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491733673087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3406958 + ... + 3548355.

It is an arithmetic number, because the mean of its divisors is an integer number (43853254770).

Almost surely, 2^491733673787 is an apocalyptic number.

491733673787 is a deficient number, since it is larger than the sum of its proper divisors (34505383453).

491733673787 is an equidigital number, since it uses as much as digits as its factorization.

491733673787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6955454 (or 6955393 counting only the distinct ones).

The product of its digits is 112021056, while the sum is 65.

The spelling of 491733673787 in words is "four hundred ninety-one billion, seven hundred thirty-three million, six hundred seventy-three thousand, seven hundred eighty-seven".