491983638082 has 16 divisors (see below), whose sum is σ = 744932197152. Its totient is φ = 243673274880.

The previous prime is 491983638061. The next prime is 491983638101. The reversal of 491983638082 is 280836389194.

It is a self number, because there is not a number n which added to its sum of digits gives 491983638082.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2790853 + ... + 2961895.

It is an arithmetic number, because the mean of its divisors is an integer number (46558262322).

Almost surely, 2^491983638082 is an apocalyptic number.

491983638082 is a deficient number, since it is larger than the sum of its proper divisors (252948559070).

491983638082 is a wasteful number, since it uses less digits than its factorization.

491983638082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184593.

The product of its (nonzero) digits is 17915904, while the sum is 61.

The spelling of 491983638082 in words is "four hundred ninety-one billion, nine hundred eighty-three million, six hundred thirty-eight thousand, eighty-two".