491613855798 has 32 divisors (see below), whose sum is σ = 1058898204000. Its totient is φ = 151260431616.

The previous prime is 491613855791. The next prime is 491613855823. The reversal of 491613855798 is 897558316194.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491613855791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2482468 + ... + 2673176.

It is an arithmetic number, because the mean of its divisors is an integer number (33090568875).

Almost surely, 2^491613855798 is an apocalyptic number.

491613855798 is an abundant number, since it is smaller than the sum of its proper divisors (567284348202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491613855798 is a wasteful number, since it uses less digits than its factorization.

491613855798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223776.

The product of its digits is 65318400, while the sum is 66.

The spelling of 491613855798 in words is "four hundred ninety-one billion, six hundred thirteen million, eight hundred fifty-five thousand, seven hundred ninety-eight".