491137969248 has 72 divisors (see below), whose sum is σ = 1401609075048. Its totient is φ = 163134139392.

The previous prime is 491137969237. The next prime is 491137969321. The reversal of 491137969248 is 842969731194.

491137969248 is a `hidden beast` number, since 4 + 9 + 11 + 379 + 6 + 9 + 248 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2931465 + ... + 3094472.

It is an arithmetic number, because the mean of its divisors is an integer number (19466792709).

Almost surely, 2^491137969248 is an apocalyptic number.

491137969248 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

491137969248 is an abundant number, since it is smaller than the sum of its proper divisors (910471105800).

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

491137969248 is a wasteful number, since it uses less digits than its factorization.

491137969248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6026236 (or 6026225 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The spelling of 491137969248 in words is "four hundred ninety-one billion, one hundred thirty-seven million, nine hundred sixty-nine thousand, two hundred forty-eight".