491335563263 has 8 divisors (see below), whose sum is σ = 494072866560. Its totient is φ = 488598510240.

The previous prime is 491335563233. The next prime is 491335563293. The reversal of 491335563263 is 362365533194.

It is an interprime number because it is at equal distance from previous prime (491335563233) and next prime (491335563293).

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

It is a cyclic number.

It is not a de Polignac number, because 491335563263 - 2¹⁴ = 491335546879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491335563233) 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, 5018978 + ... + 5115936.

It is an arithmetic number, because the mean of its divisors is an integer number (61759108320).

Almost surely, 2^491335563263 is an apocalyptic number.

491335563263 is a deficient number, since it is larger than the sum of its proper divisors (2737303297).

491335563263 is a wasteful number, since it uses less digits than its factorization.

491335563263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125137.

The product of its digits is 5248800, while the sum is 50.

The spelling of 491335563263 in words is "four hundred ninety-one billion, three hundred thirty-five million, five hundred sixty-three thousand, two hundred sixty-three".