491100678 has 32 divisors (see below), whose sum is σ = 1116720000. Its totient is φ = 159892488.

The previous prime is 491100647. The next prime is 491100707. The reversal of 491100678 is 876001194.

491100678 is a `hidden beast` number, since 491 + 100 + 67 + 8 = 666.

It is a Curzon number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 103428 + ... + 108071.

It is an arithmetic number, because the mean of its divisors is an integer number (34897500).

Almost surely, 2^491100678 is an apocalyptic number.

491100678 is an abundant number, since it is smaller than the sum of its proper divisors (625619322).

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

491100678 is a wasteful number, since it uses less digits than its factorization.

491100678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211553 (or 211547 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 491100678 is about 22160.7914569855. The cubic root of 491100678 is about 788.9633778488.

The spelling of 491100678 in words is "four hundred ninety-one million, one hundred thousand, six hundred seventy-eight".