491544913859 has 8 divisors (see below), whose sum is σ = 494300326608. Its totient is φ = 488792130400.

The previous prime is 491544913829. The next prime is 491544913897. The reversal of 491544913859 is 958319445194.

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 491544913859 - 2³² = 487249946563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491544913819) 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, 281777 + ... + 1030770.

It is an arithmetic number, because the mean of its divisors is an integer number (61787540826).

Almost surely, 2^491544913859 is an apocalyptic number.

491544913859 is a deficient number, since it is larger than the sum of its proper divisors (2755412749).

491544913859 is a wasteful number, since it uses less digits than its factorization.

491544913859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314645.

The product of its digits is 27993600, while the sum is 62.

The spelling of 491544913859 in words is "four hundred ninety-one billion, five hundred forty-four million, nine hundred thirteen thousand, eight hundred fifty-nine".