491231429585 has 32 divisors (see below), whose sum is σ = 642660480000. Its totient is φ = 358285441536.

The previous prime is 491231429581. The next prime is 491231429593. The reversal of 491231429585 is 585924132194.

It is a cyclic number.

It is not a de Polignac number, because 491231429585 - 2² = 491231429581 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491231429581) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5270216 + ... + 5362614.

It is an arithmetic number, because the mean of its divisors is an integer number (20083140000).

Almost surely, 2^491231429585 is an apocalyptic number.

It is an amenable number.

491231429585 is a deficient number, since it is larger than the sum of its proper divisors (151429050415).

491231429585 is a wasteful number, since it uses less digits than its factorization.

491231429585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93425.

The product of its digits is 3110400, while the sum is 53.

The spelling of 491231429585 in words is "four hundred ninety-one billion, two hundred thirty-one million, four hundred twenty-nine thousand, five hundred eighty-five".