491005774842 has 32 divisors (see below), whose sum is σ = 1073188224000. Its totient is φ = 148525337520.

The previous prime is 491005774837. The next prime is 491005774873. The reversal of 491005774842 is 248477500194.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6569842 + ... + 6644157.

It is an arithmetic number, because the mean of its divisors is an integer number (33537132000).

Almost surely, 2^491005774842 is an apocalyptic number.

491005774842 is an abundant number, since it is smaller than the sum of its proper divisors (582182449158).

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

491005774842 is a wasteful number, since it uses less digits than its factorization.

491005774842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13214578.

The product of its (nonzero) digits is 2257920, while the sum is 51.

The spelling of 491005774842 in words is "four hundred ninety-one billion, five million, seven hundred seventy-four thousand, eight hundred forty-two".