491472174844 has 192 divisors, whose sum is σ = 1132681052160. Its totient is φ = 181600911360.

The previous prime is 491472174727. The next prime is 491472174847. The reversal of 491472174844 is 448471274194.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491472174847) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32913172 + ... + 32928100.

It is an arithmetic number, because the mean of its divisors is an integer number (5899380480).

Almost surely, 2^491472174844 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491472174844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (566340526080).

491472174844 is an abundant number, since it is smaller than the sum of its proper divisors (641208877316).

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

491472174844 is a wasteful number, since it uses less digits than its factorization.

491472174844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15108 (or 15106 counting only the distinct ones).

The product of its digits is 7225344, while the sum is 55.

The spelling of 491472174844 in words is "four hundred ninety-one billion, four hundred seventy-two million, one hundred seventy-four thousand, eight hundred forty-four".