491078446264 has 64 divisors (see below), whose sum is σ = 1073324678400. Its totient is φ = 206280635904.

The previous prime is 491078446217. The next prime is 491078446267. The reversal of 491078446264 is 462644870194.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491078446267) 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, 892927 + ... + 1333969.

It is an arithmetic number, because the mean of its divisors is an integer number (16770698100).

Almost surely, 2^491078446264 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 491078446264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (536662339200).

491078446264 is an abundant number, since it is smaller than the sum of its proper divisors (582246232136).

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

491078446264 is a wasteful number, since it uses less digits than its factorization.

491078446264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441452 (or 441448 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 55.

The spelling of 491078446264 in words is "four hundred ninety-one billion, seventy-eight million, four hundred forty-six thousand, two hundred sixty-four".