491196388008 has 32 divisors (see below), whose sum is σ = 1281381883200. Its totient is φ = 156613340928.

The previous prime is 491196387973. The next prime is 491196388049. The reversal of 491196388008 is 800883691194.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444923713 + ... + 444924816.

It is an arithmetic number, because the mean of its divisors is an integer number (40043183850).

Almost surely, 2^491196388008 is an apocalyptic number.

It is an amenable number.

491196388008 is an abundant number, since it is smaller than the sum of its proper divisors (790185495192).

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

491196388008 is a wasteful number, since it uses less digits than its factorization.

491196388008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889848561 (or 889848557 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 57.

The spelling of 491196388008 in words is "four hundred ninety-one billion, one hundred ninety-six million, three hundred eighty-eight thousand, eight".