491998632704 has 18 divisors (see below), whose sum is σ = 982075396260. Its totient is φ = 245999316224.

The previous prime is 491998632679. The next prime is 491998632737. The reversal of 491998632704 is 407236899194.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960934574 + ... + 960935085.

Almost surely, 2^491998632704 is an apocalyptic number.

It is an amenable number.

491998632704 is a deficient number, since it is larger than the sum of its proper divisors (490076763556).

491998632704 is an equidigital number, since it uses as much as digits as its factorization.

491998632704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921869675 (or 1921869661 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 62.

The spelling of 491998632704 in words is "four hundred ninety-one billion, nine hundred ninety-eight million, six hundred thirty-two thousand, seven hundred four".