491729646015 has 96 divisors (see below), whose sum is σ = 950442854400. Its totient is φ = 233720847360.

The previous prime is 491729645941. The next prime is 491729646017. The reversal of 491729646015 is 510646927194.

491729646015 is a `hidden beast` number, since 4 + 9 + 1 + 7 + 29 + 6 + 4 + 601 + 5 = 666.

It is not a de Polignac number, because 491729646015 - 2⁷ = 491729645887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491729646017) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 33583066 + ... + 33597704.

It is an arithmetic number, because the mean of its divisors is an integer number (9900446400).

Almost surely, 2^491729646015 is an apocalyptic number.

491729646015 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

491729646015 is a deficient number, since it is larger than the sum of its proper divisors (458713208385).

491729646015 is a wasteful number, since it uses less digits than its factorization.

491729646015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16997 (or 16994 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 491729646015 in words is "four hundred ninety-one billion, seven hundred twenty-nine million, six hundred forty-six thousand, fifteen".