491574795916 has 12 divisors (see below), whose sum is σ = 860317981488. Its totient is φ = 245769658352.

The previous prime is 491574795869. The next prime is 491574795919. The reversal of 491574795916 is 619597475194.

It is not an unprimeable number, because it can be changed into a prime (491574795919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4372456 + ... + 4483471.

It is an arithmetic number, because the mean of its divisors is an integer number (71693165124).

Almost surely, 2^491574795916 is an apocalyptic number.

It is an amenable number.

491574795916 is a deficient number, since it is larger than the sum of its proper divisors (368743185572).

491574795916 is a wasteful number, since it uses less digits than its factorization.

491574795916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8869808 (or 8869806 counting only the distinct ones).

The product of its digits is 85730400, while the sum is 67.

The spelling of 491574795916 in words is "four hundred ninety-one billion, five hundred seventy-four million, seven hundred ninety-five thousand, nine hundred sixteen".