491102047690 has 16 divisors (see below), whose sum is σ = 884307420000. Its totient is φ = 196368878160.

The previous prime is 491102047687. The next prime is 491102047691. The reversal of 491102047690 is 96740201194.

It is a super-3 number, since 3×491102047690³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (491102047691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8963940 + ... + 9018559.

It is an arithmetic number, because the mean of its divisors is an integer number (55269213750).

Almost surely, 2^491102047690 is an apocalyptic number.

491102047690 is a deficient number, since it is larger than the sum of its proper divisors (393205372310).

491102047690 is a wasteful number, since it uses less digits than its factorization.

491102047690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17985237.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 491102047690 in words is "four hundred ninety-one billion, one hundred two million, forty-seven thousand, six hundred ninety".