491868264192 has 144 divisors (see below), whose sum is σ = 1386395162880. Its totient is φ = 154486480896.

The previous prime is 491868264119. The next prime is 491868264221. The reversal of 491868264192 is 291462868194.

It is a happy number.

It is a super-2 number, since 2×491868264192² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 975684 + ... + 1391292.

Almost surely, 2^491868264192 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 491868264192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (693197581440).

491868264192 is an abundant number, since it is smaller than the sum of its proper divisors (894526898688).

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

491868264192 is a wasteful number, since it uses less digits than its factorization.

491868264192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415718 (or 415704 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 60.

The spelling of 491868264192 in words is "four hundred ninety-one billion, eight hundred sixty-eight million, two hundred sixty-four thousand, one hundred ninety-two".