491609776 has 40 divisors (see below), whose sum is σ = 1091770400. Its totient is φ = 210069504.

The previous prime is 491609773. The next prime is 491609809. The reversal of 491609776 is 677906194.

It is not an unprimeable number, because it can be changed into a prime (491609773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32800 + ... + 45376.

It is an arithmetic number, because the mean of its divisors is an integer number (27294260).

Almost surely, 2^491609776 is an apocalyptic number.

It is an amenable number.

491609776 is an abundant number, since it is smaller than the sum of its proper divisors (600160624).

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

491609776 is a wasteful number, since it uses less digits than its factorization.

491609776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12941 (or 12935 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 491609776 is about 22172.2749396628. The cubic root of 491609776 is about 789.2359091800.

The spelling of 491609776 in words is "four hundred ninety-one million, six hundred nine thousand, seven hundred seventy-six".