491614686 has 12 divisors (see below), whose sum is σ = 1065165192. Its totient is φ = 163871556.

The previous prime is 491614667. The next prime is 491614691. The reversal of 491614686 is 686416194.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13655946 + ... + 13655981.

It is an arithmetic number, because the mean of its divisors is an integer number (88763766).

Almost surely, 2^491614686 is an apocalyptic number.

491614686 is an abundant number, since it is smaller than the sum of its proper divisors (573550506).

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

491614686 is a wasteful number, since it uses less digits than its factorization.

491614686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27311935 (or 27311932 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 491614686 is about 22172.3856632524. The cubic root of 491614686 is about 789.2385366945.

The spelling of 491614686 in words is "four hundred ninety-one million, six hundred fourteen thousand, six hundred eighty-six".