491669356 has 24 divisors (see below), whose sum is σ = 865751040. Its totient is φ = 244318032.

The previous prime is 491669329. The next prime is 491669363. The reversal of 491669356 is 653966194.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 745755 + ... + 746413.

It is an arithmetic number, because the mean of its divisors is an integer number (36072960).

Almost surely, 2^491669356 is an apocalyptic number.

It is an amenable number.

491669356 is a deficient number, since it is larger than the sum of its proper divisors (374081684).

491669356 is a wasteful number, since it uses less digits than its factorization.

491669356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533 (or 1531 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 49.

The square root of 491669356 is about 22173.6184688021. The cubic root of 491669356 is about 789.2677913612.

The spelling of 491669356 in words is "four hundred ninety-one million, six hundred sixty-nine thousand, three hundred fifty-six".