491158049140 has 24 divisors (see below), whose sum is σ = 1125198440352. Its totient is φ = 178602926880.

The previous prime is 491158049119. The next prime is 491158049183. The reversal of 491158049140 is 41940851194.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1116268074 + ... + 1116268513.

It is an arithmetic number, because the mean of its divisors is an integer number (46883268348).

Almost surely, 2^491158049140 is an apocalyptic number.

It is an amenable number.

491158049140 is an abundant number, since it is smaller than the sum of its proper divisors (634040391212).

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

491158049140 is a wasteful number, since it uses less digits than its factorization.

491158049140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232536607 (or 2232536605 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 46.

The spelling of 491158049140 in words is "four hundred ninety-one billion, one hundred fifty-eight million, forty-nine thousand, one hundred forty".