491652914981 has 8 divisors (see below), whose sum is σ = 507521247744. Its totient is φ = 475785117360.

The previous prime is 491652914947. The next prime is 491652915007. The reversal of 491652914981 is 189419256194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491652914981 is a prime.

It is a super-2 number, since 2×491652914981² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 491652914981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491652914281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2659115 + ... + 2837991.

It is an arithmetic number, because the mean of its divisors is an integer number (63440155968).

Almost surely, 2^491652914981 is an apocalyptic number.

It is an amenable number.

491652914981 is a deficient number, since it is larger than the sum of its proper divisors (15868332763).

491652914981 is a wasteful number, since it uses less digits than its factorization.

491652914981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267571.

The product of its digits is 5598720, while the sum is 59.

The spelling of 491652914981 in words is "four hundred ninety-one billion, six hundred fifty-two million, nine hundred fourteen thousand, nine hundred eighty-one".