491673612 has 54 divisors (see below), whose sum is σ = 1185937788. Its totient is φ = 158539968.

The previous prime is 491673593. The next prime is 491673619. The reversal of 491673612 is 216376194.

It is not an unprimeable number, because it can be changed into a prime (491673619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2841958 + ... + 2842130.

Almost surely, 2^491673612 is an apocalyptic number.

It is an amenable number.

491673612 is an abundant number, since it is smaller than the sum of its proper divisors (694264176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491673612 is a wasteful number, since it uses less digits than its factorization.

491673612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 215 counting only the distinct ones).

The product of its digits is 54432, while the sum is 39.

The square root of 491673612 is about 22173.7144384968. The cubic root of 491673612 is about 789.2700687142.

The spelling of 491673612 in words is "four hundred ninety-one million, six hundred seventy-three thousand, six hundred twelve".