491015600 has 30 divisors (see below), whose sum is σ = 1179665940. Its totient is φ = 196406080.

The previous prime is 491015599. The next prime is 491015611. The reversal of 491015600 is 6510194.

It is a self number, because there is not a number n which added to its sum of digits gives 491015600.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 613370 + ... + 614169.

It is an arithmetic number, because the mean of its divisors is an integer number (39322198).

Almost surely, 2^491015600 is an apocalyptic number.

491015600 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

491015600 is an abundant number, since it is smaller than the sum of its proper divisors (688650340).

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

491015600 is a wasteful number, since it uses less digits than its factorization.

491015600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227557 (or 1227546 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 491015600 is about 22158.8718124367. The cubic root of 491015600 is about 788.9178153632.

Adding to 491015600 its reverse (6510194), we get a palindrome (497525794).

The spelling of 491015600 in words is "four hundred ninety-one million, fifteen thousand, six hundred".